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Possibilities and challenges for physical and social environment research in Brazil: a systematic literature review on health behaviors

Possibilidades e desafios para pesquisas sobre ambiente físico e social no Brasil: uma revisão sistemática da literatura sobre comportamentos de saúde

Posibilidades y desafíos para la investigación sobre el entorno físico y social en Brasil: una revisión sistemática de la literatura sobre conductas de salud

Abstracts

This systematic review analyzed articles focused on the relationship between environment (physical, built, perceived, and social) and smoking, alcohol drinking, physical activity, diet, and obesity in Brazil. Studies published between 19952011 were retrieved from seven databases and hand searches. Based on the 42 articles reviewed, gaps were identified and recommendations were made for future research. Despite a growing number of studies, the Brazilian literature is still limited. The increase of articles in 2010-2011 coincided with the diversification of lifestyles studied, although physical activity domain remains predominant. Most studies analyzed neighborhood settings and used subjective measures for lifestyle and for environment. The presence of recreational facilities was the main physical environment aspect studied, while safety from crime was the prominent social environment factor. More research is needed to yield a rich body of evidence that leads to theoretical and methodological advances, and that supports interventions aimed at creating healthy environments.

Environment and Public Health; Health Behavior; Obesity; Review


Esta revisão sistemática avaliou artigos foca-dos na relação entre ambiente (físico, construído, percebido e social) e tabagismo, consumo de álcool, prática de atividade física, hábito alimentar e obesidade no Brasil. Estudos publicados entre 1995 e 2011 foram identificados em sete bases de dados e em buscas manuais. Baseado nos 42 artigos revisados, lacunas foram identificadas e recomendações feitas para futuros estudos. Apesar da crescente produção, a literatura ainda é limitada. O maior número de artigos em 2010-2011 coincidiu com uma ligeira diversificação dos estilos de vida estudados, embora as atividades físicas ainda predominem. Muitos estudos analisaram vizinhanças e usaram medidas subjetivas para estilos de vida e fatores ambientais. A disponibilidade de espaços de recreação foi o principal fator de ambiente físico avaliado, enquanto que a questão de segurança se destacou no ambiente social. É preciso produzir mais evidências para contribuir com avanços no campo teórico e metodológico e com o delineamento de intervenções voltadas para criar espaços saudáveis.

Meio Ambiente e Saúde Pública; Comportamentos Saudáveis; Obesidade; Revisão


Esta revisión sistemática evaluó estudios enfocados en la relación entre el entorno (físico, construido, social y percibido) y tabaquismo, consumo de alcohol, actividad física, dieta y obesidad en Brasil. Los estudios publicados entre 1995-2011 se identificaron a través de siete bases de datos y búsqueda manual. En base a 42 artículos, se identificaron deficiencias y se realizaron recomendaciones para futuros estudios. A pesar del aumento en la producción, la literatura brasileña es todavía limitada. El incremento de artículos en 20102011 coincidió con una diversificación de los estilos de vida analizados, aunque todavía predominan las actividades físicas. La mayoría de los estudios examinaron barrios y usaron medidas subjetivas para el estilo de vida y los factores ambientales. La disponibilidad de espacios de ocio fue el principal factor del entorno físico evaluado. La falta de seguridad se destacó en el entorno social. Se necesitan más estudios para contribuir en los avances teóricos y metodológicos y en el diseño de intervenciones dirigidas a la creación de espacios saludables.

Medio Ambiente y Salud Pública; Conductas Saludables; Obesidad; Revisión


REVISÃO REVIEW

Possibilities and challenges for physical and social environment research in Brazil: a systematic literature review on health behaviors

Possibilidades e desafios para pesquisas sobre ambiente físico e social no Brasil: uma revisão sistemática da literatura sobre comportamentos de saúde

Posibilidades y desafíos para la investigación sobre el entorno físico y social en Brasil: una revisión sistemática de la literatura sobre conductas de salud

Ana Paula Belon; Candace Nykiforuk

School of Public Health, University of Alberta, Edmonton, Canada

Correspondence Correspondence A. P. Belon School of Public Health, University of Alberta. 3-256 Edmonton Clinic Health Academy, 11405 – 87 Ave, Edmonton / AB – T6G 1C9, Canada. ana.belon@ualberta.ca

ABSTRACT

This systematic review analyzed articles focused on the relationship between environment (physical, built, perceived, and social) and smoking, alcohol drinking, physical activity, diet, and obesity in Brazil. Studies published between 19952011 were retrieved from seven databases and hand searches. Based on the 42 articles reviewed, gaps were identified and recommendations were made for future research. Despite a growing number of studies, the Brazilian literature is still limited. The increase of articles in 2010-2011 coincided with the diversification of lifestyles studied, although physical activity domain remains predominant. Most studies analyzed neighborhood settings and used subjective measures for lifestyle and for environment. The presence of recreational facilities was the main physical environment aspect studied, while safety from crime was the prominent social environment factor. More research is needed to yield a rich body of evidence that leads to theoretical and methodological advances, and that supports interventions aimed at creating healthy environments.

Environment and Public Health; Health Behavior; Obesity; Review

RESUMO

Esta revisão sistemática avaliou artigos foca-dos na relação entre ambiente (físico, construído, percebido e social) e tabagismo, consumo de álcool, prática de atividade física, hábito alimentar e obesidade no Brasil. Estudos publicados entre 1995 e 2011 foram identificados em sete bases de dados e em buscas manuais. Baseado nos 42 artigos revisados, lacunas foram identificadas e recomendações feitas para futuros estudos. Apesar da crescente produção, a literatura ainda é limitada. O maior número de artigos em 2010-2011 coincidiu com uma ligeira diversificação dos estilos de vida estudados, embora as atividades físicas ainda predominem. Muitos estudos analisaram vizinhanças e usaram medidas subjetivas para estilos de vida e fatores ambientais. A disponibilidade de espaços de recreação foi o principal fator de ambiente físico avaliado, enquanto que a questão de segurança se destacou no ambiente social. É preciso produzir mais evidências para contribuir com avanços no campo teórico e metodológico e com o delineamento de intervenções voltadas para criar espaços saudáveis.

Meio Ambiente e Saúde Pública; Comportamentos Saudáveis; Obesidade; Revisão

RESUMEN

Esta revisión sistemática evaluó estudios enfocados en la relación entre el entorno (físico, construido, social y percibido) y tabaquismo, consumo de alcohol, actividad física, dieta y obesidad en Brasil. Los estudios publicados entre 1995-2011 se identificaron a través de siete bases de datos y búsqueda manual. En base a 42 artículos, se identificaron deficiencias y se realizaron recomendaciones para futuros estudios. A pesar del aumento en la producción, la literatura brasileña es todavía limitada. El incremento de artículos en 20102011 coincidió con una diversificación de los estilos de vida analizados, aunque todavía predominan las actividades físicas. La mayoría de los estudios examinaron barrios y usaron medidas subjetivas para el estilo de vida y los factores ambientales. La disponibilidad de espacios de ocio fue el principal factor del entorno físico evaluado. La falta de seguridad se destacó en el entorno social. Se necesitan más estudios para contribuir en los avances teóricos y metodológicos y en el diseño de intervenciones dirigidas a la creación de espacios saludables.

Medio Ambiente y Salud Pública; Conductas Saludables; Obesidad; Revisión

Introduction

Evidence supports that the places where people live, study and work create opportunities for or barriers to engage in healthy lifestyles 1,2,3. Due to the increasing prevalence of chronic diseases worldwide and the limited effectiveness of individual-based interventions in long-term behavioral change 4,5,6, a renewed interest in the environment has drawn attention to the influences of structural and environmental conditions on health behaviors since 1990 7,8,9.

Oriented mainly by socioecological models 7, a large number of studies in this research track have sought to understand how the features of the areas where people live might be healthdamaging or health-promoting. In other words, an individual's surrounding environment may inhibit or foster health and well-being as it provides the broader context of opportunities (e.g., supportive infrastructure for physical activity, farmer's markets to improve access to fresh fruits and vegetables, and smoke-free zones) for people to develop and maintain (un)healthy choices 10,11. From multi-level models with complex causal pathways, one understands that health outcomes would be the result of the interaction between individual characteristics (e.g., income, occupation, and education level) and environmental factors 12,13,14,15.

The impact of physical and social environment on lifestyles has been widely investigated in high-income countries 16,17, where the identification of the environmental determinants of health behaviors has stimulated the debate with national and local authorities about appropriate actions to support health promotion 5,18. From a solid and consistent body of evidence, this knowledge has been translated into practice, leading to the development of several initiatives, such as embellishment of existent areas to promote physical activities and school interventions to increase the consumption of vegetables and fruits 10,12,19.

The environment, or areas where people live, has been conceptualized in different ways by the research community. In general, environment can be divided into physical environment (including natural and built environment) and social environment. Natural environment refers to weather, green areas, air quality, among others. Built environment attributes, in turn, encompass neighborhood design factors, mixed land use, density, aesthetical attributes, availability of and access to facilities (e.g., parks, recreational facilities, and liquor stores). Finally, social environment features range from feelings of personal safety to policies and media promoting (un)healthy lifestyles.

To date, few studies addressing the influences of the physical and social environment on healthy lifestyles are being carried out in lowand middle-income countries. Particularly, in Brazil, despite an increasing number of studies on this topic, the evidence base in the literature is limited and provides insufficient information to support decision makers in the development and implementation of interventions aimed at creation of environments that are more conducive to healthy behaviors 20,21.

Therefore, the aim of this review was to analyze peer-reviewed articles that have applied theoretical and/or methodological approaches related to environment (physical, built, perceived, and social) and lifestyles (tobacco use, alcohol consumption, physical activity, and eating habits) or obesity in Brazil. The literature review focuses only on these selected lifestyles and obesity since they are common risk factors for chronic diseases and, thus, important targets for prevention and control strategies. This study describes trends and patterns of the literature reviewed, as well as the conceptualization, operationalisation, and measurement of the environment. The purpose of this paper was to summarize the main characteristics of the existing body of literature, identify gaps in the knowledge and, consequently, provide recommendations for future research for environment and health in Brazil.

Methods

Search strategy and article selection

The systematic review examined peer-reviewed articles, including systematic literature reviews, validation studies, evaluation studies, and qualitative and quantitative studies. The articles met the following inclusion criteria: (1) analyzed any characteristic of the relationship between physical, built, perceived, or social environment and smoking, alcohol misuse, absence of physical activity, poor diet, or obesity in the Brazilian context; (2) published between January 1st, 1995 and December 31th, 2011; (3) written in Portuguese or English languages; (4) were peer-reviewed articles published in academic journals. Ulrich's International Periodicals Directory was used to exclude trade journals and popular magazines indexed by physical activity databases. Papers describing some policies and programs (i.e., without analysis of environmental or behavioral factors) or focusing on theoretical discussion only were excluded. The Brazilian literature included in this review comprised any article that addressed the topic of environment and lifestyles in Brazil, regardless of the affiliation of authors or the country where the journals were published. The choice for starting the search in 1995 was based on the resurgence of academic interest in the influences of the physical and social environment in health in the mid-1990s 7,8.

Using English and Portuguese search terms, peer-reviewed literature was retrieved from the following electronic databases: LILACS (1982 to the present), MEDLINE (1948 to the present, also including Medline(R) In-Process & Other Non-Indexed Citations), PubMed (1950 to the present), SciELO Brazil (1998 to the present), Sociological Abstracts (1952 to the present), Sport-Discus (1939 to 2011), and Web of Science (1990 to the present). Due to the limitations of electronic searching 22,23,24, we performed reference list searching, hand-searching relevant journals, and author-name searching in order to identify a comprehensive range of studies. Moreover, publications of key authors were searched for on the Plataforma Lattes website (http://lattes.cnpq. br/), which is an open database of the National Council for Scientific and Technological Development (CNPq) containing the curriculum vitae of the Brazilian scientific community.

The following keywords and their variants related to the environment were used: built environment, physical environment, social environment, perceived environment, healthy environment, environmental perception, environment design, and environmental factors. To capture lifestyles, the search terms included, but were not limited to: lifestyle, walkability, walking, commuting, active living, sports, physical activity, leisure time, sedentary, tobacco, smoking, alcohol, obesity, body mass index, dietary, eating, and unhealthy food. In the electronic search, these keywords were searched within titles and abstracts for environment factors and for lifestyles. To restrict the search of articles to a focus on the Brazilian context, the words Brazil and Brazilian were searched in the title, abstract, authors' affiliation, and main text. The search log containing the full list of terms used for each database is available from the corresponding author upon request.

To verify if the articles retrieved met the inclusion criteria, two reviewers (the main author and a trained researcher assistant) independently screened the titles and abstracts of all articles initially identified, using a strict protocol (available upon request). In case of any disagreement between the reviewers, decisions were made through discussions among the two authors and the research assistant. When the exact focus of the article was not clear, the reviewers read the full text if it was written in English; otherwise, the main author conducted this task. RefWorks software (RefWorks-COS, Bethesda, USA) was used as reference manager. The review protocol is not registered in any protocol database.

Data extraction

Figure 1 illustrates the search flow of the literature review process. By July 2012, the literature search across the electronic databases retrieved 966 articles. After removing duplicate references (n = 343) and off-topic articles (n = 510), 113 potentially eligible articles were selected to undergo full article review (inter-rater agreement = 91%). The majority of the publications excluded had used the term environment in another connotation than physical and social environment (e.g., domestic violence). The full article review resulted in a total of 42 articles deemed appropriate for analysis 16,17,20,21,25,26,27,28,29,30,31,32,33,34, 35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56, 57,58,59,60,61,62.


The information from the articles selected was extracted by one researcher (the main author) and was checked by the second author for accuracy and completeness, if the full text was in English. For data extraction, we used a closeand open-ended questions form, which was developed in the Microsoft Access 2007 software (Microsoft Corp., USA). The following information was identified: citation, language, objective, study design, population, setting, measures of environment and lifestyles, main findings, recommendations related to the environment, and conclusions.

Data analysis

Basic bibliometric analysis 63 was undertaken to examine trends and patterns in the literature, which are essential to better understand the development and breadth of the physical and social environment research areas in Brazil. Frequency analyses were calculated for all coded variables. Multiple entries for some variables might be reported from one study; therefore, the sum of the categories of these variables might exceed the total number of articles included. For instance, papers whose samples' age ranges fit into multiple pre-defined categories (< 18, 18-59, 60 and over) were counted more than once; studies analyzing more than one lifestyle also contributed multiple records.

The identification of the levels or sizes of environment analyzed by the articles was based on the Analysis Grid for Environments Linked to Obesity (ANGELO) 15. Although this conceptual framework was originally developed to examine obesogenic environments, it has proved useful in other health settings, such as smoking and alcohol misuse 64. The framework is a 2x4 grid that classifies the environment according to its size (micro-environmental settings and the macro-environmental sectors) and its type (physical, economic, political, and socio-cultural). Due to the small number of articles focused on Brazil, the axis related to the type of environment was not used. According to the ANGELO framework, micro-environment involves interactions between people or groups in a small area (e.g., workplaces, schools, and neighborhoods), whereas macro-environment includes broader sectors (e.g., media, government, and group of industries) that influence various settings in a diffuse way.

Results

Table 1 summarizes the main characteristics of each of the 42 articles included in this systematic review. Bibliometric characteristics and their relative frequency are shown in Table 2. Although researchers affiliated to Brazilian universities and research centers were the first authors in 33 out of 42 articles included (78.6%), there was a strong presence of foreign researchers and professors in the authorship (42.9%), with a predominance of those from the United States (82.4%). Most studies were written in English, which is not surprising given the volume of papers published in non-Brazilian journals (69%). The vast majority of articles were published in journals whose main topics were public health and safety and physical fitness and hygiene. About 65% of the papers were published between 2010 and 2011. This review also revealed a distinct concentration of papers produced by a small group of academics, who have worked mainly in the physical activity domain (data not shown).

Table 3 presents some methodological characteristics of the articles reviewed. Studying the relationship between environmental factors and lifestyles was the main objective in 40 out of 42 articles (95.2%). Most studies used crosssectional designs. Only three qualitative articles (7.1%) and one ecological study (2.4%) were identified. Among the quantitative studies, the sample size ranged from 30 to 54,369. Adults and elderly people were studied almost equally; children aged less than 18 years were under-studied. Most research was carried out in only three cities: Curitiba, São Paulo, and Recife. The physical activity domain outweighed the other lifestyles investigated, whereas smoking and alcohol consumption were less studied. Subjective measures of either lifestyle (e.g., practice of physical activity and consumption of fruits and vegetables per week) or environment attributes (e.g., perceived walking distance from home to commercial establishments and perception of safety) were used in the majority of the articles. Surveys were the most common instruments used to gather information about lifestyles and environmental factors. Only two articles applied GIS (Geographic Information System) techniques to geocode environmental attributes in the neighborhood (data not shown).

To collect data on lifestyle factors, the International Physical Activity Questionnaire (IPAQ) long version 65 was the most frequently applied questionnaire. To assess the environment, Neighborhood Environmental Walkability Scale (NEWS) 66 was extensively used (Table 3). A large proportion of the articles (59.5%) focused on micro-environment, particularly neighborhood settings. Remaining articles were distributed across recreational facilities/open spaces/ parks, workplace, and school. In 28.6% of the articles, the exact setting could not be identified. In comparison to the micro-environment, the macro-environment domain featured less prominently. Since some of the articles evaluated more than one type of macro-environment, multiple answers to this question were considered. Within this domain, mass media represented the factor that was analyzed most often (44.5%). Among the articles related to public policies and programs, community-based interventions aimed at promoting physical activity in some Brazilian State capitals were the most studied, especially those analyzing Academia da Cidade ("City Gyms") in the city of Recife, in Northeastern Brazil.

Additional investigation (data not shown) indicated that few articles studied social inequalities related to physical and social environment: only eight articles addressed the relationship between socioeconomic indicators and environment and 14 articles analyzed environmental attributes according to gender. Moreover, the review found that nine studies applied international questionnaires for environment, which had not been validated in Brazil. The questionnaires were: Physical Activity Neighborhood Environment Scale (PANES) 67, NEWS-Abbreviated (NEWS-A) 68, and modified version of NEWS, whose full version had been validated in Brazil 45.

Table 4 shows which components of physical and social environment were investigated in Brazil. Recreational facilities (71.4%), walking and cycling infrastructure (57.1%), and accessibility to non-residential areas (54.8%) were the main physical environment factors studied. Safety from crime was the prominent social environment factor, accounting for 64.3% of all studies.

Further analysis (data not shown) identified that few articles used the following terms built (13), physical (10), social (10), and perceived (15) environment. Among them, very few articles provided direct or indirect concepts (using citations) for built (9), physical (4), social (5), and perceived (9) environment.

Discussion

The present research sought to shed light on the types of studies that have focused on the relationship between physical and social environment and health in Brazil. By describing the trends and patterns of the Brazilian literature focused on the relationship between the environment and lifestyles, this study identified gaps in the scientific production of knowledge. Based on the unaddressed topics, recommendations for future progress are provided below.

Our literature review revealed that only 42 articles were published in peer-reviewed journals between 1995 and 2011. Despite this limited amount of studies, there is a growing Brazilian literature addressing issues related to the impact of physical and social environment on lifestyles. The notable publication peak in 2010 and 2011 is indicative of the greater academic interest in this research field in Brazil. The study findings also suggested that international partnerships have boosted scientific production with the participation of co-authors from other countries in half of the articles included in this review. Particularly, the partnership with institutions from the United States in the development of studies has led to a rich and fruitful exchange of expertise in this research field, which has been converted into a rapidly growing body of publications concerning physical and social environment and health in Brazil.

Despite this recent surge in publications, one chief explanation for the small number of articles since 1995 is that few academics in Brazil are working in this research track. Many of these researchers represented in this review have expertise in physical activity domain; as a result, the growing Brazilian body of research in physical and social environment has mainly focused on this topic, which represented almost 80% of all studies included here. Physical activity has also been the main lifestyle investigated in high-income countries 4. Little is known about the roles that physical and social environments play in influencing eating habits and overweight/obesity in Brazil; additionally, analysis is almost non-existent for tobacco use and alcohol consumption. There is supportive evidence from studies conducted in high-income countries that environment influences dietary behaviors 69, overweight/obesity 4,70, alcohol use 71, and smoking 2 in positive and negative ways. Diversifying the topics studied is, therefore, crucial to gain a better understanding of the complexity and multifaceted nature of the physical and social environment and its effects in stimulating or discouraging the engagement in healthy lifestyles. A comprehensive picture of these relationships may provide guidance to develop a national or local action plan focused on the promotion of the environments that support healthy choices. In addition, because of different environmental mechanisms affecting each particular behavior 5,14,72, the incorporation of these important and overlooked lifestyles into the research agenda may uncover which environmental features are most influential (and highest priority for intervention) in a comprehensive health-promotion agenda.

Given that only three cities (Curitiba, São Paulo, and Recife) accounted for more than half of the geographic regions examined, additional research on how environment affects the adoption of healthy lifestyles in other cities is strongly encouraged. Study replication in different settings may improve the understanding of which aspects of the physical and social environment can be health-promoting and health-damaging.

Adults and elderly people in Brazil were studied in almost similar proportion; less attention has been paid to children and adolescents. More needs to be done for such groups, since most research carried out in high-income countries has highlighted, for example, the negative impact of obesogenic environment 70,73 and of great availability of cigarettes in the school neighborhoods 2 on the health of young people. Additionally, investigating different age groups individually or comparatively is important for understanding how and to what extent the physical and social environment shapes health-related lifestyles across the lifespan 4,10.

Our findings also showed that the current evidence for Brazil is mostly derived from crosssectional studies. The relative shortage of experimental, quasi-experimental, and longitudinal research on environment and lifestyles has also been identified in reviews conducted in highincome countries 4,13,72,73. Given their ability in determining the directionality in the association between environmental factors and lifestyles, more research should be conducted with these strong study designs to provide support to the findings from cross-sectional studies 19.

Qualitative evidence can also shed light into the relationships between environment and lifestyles, by uncovering mediating pathways and factors specific to the Brazilian context. The potential of qualitative techniques in studies on physical and social environment has been demonstrated in several articles, through which issues that are different to those found in surveys have emerged 5,18,74,75. The only three qualitative studies included in this review confirm these strengths 31,56,58. For instance, conducting focus groups among women in workplaces, Scarinci et al. 58 found that counter-advertising was considered a contributor to the smoking initiation by the current smokers. Such contextual information, which is barely captured through quantitative studies, may be helpful for intervention development, especially concerning smoking cessation campaigns.

With regard to the procedures for collecting data on environment, surveys were predominant; nevertheless, it is worth highlighting the use of the systematic observation by some studies. The audit tool has been considered a valuable strategy because its measurements are not affected by memory bias and are standardized, thus are more accurate in comparison to subjective measurements. Another advantage is that the systematic observation takes into account the presence and the quality of environmental attributes 76. An important limitation, however, is that systematic observation does not capture the perception of residents 9. It is well recognized that people create different representations of the place they are in, observing and interpreting the features of their surroundings according to their socioeconomic and cultural backgrounds 3; therefore, the inclusion of these aspects related to perceptions can provide important insights on the interactions of people with the environment and guide environmental interventions that enlarge people's choices in a meaningful way to them.

Other studies have taken advantage of the availability of administrative databases on urban planning. Despite the limitations related to the temporal disconnection between health outcome and environmental attributes, the low or unknown quality of data, the lack of comparable boundaries, and exclusion of qualitative aspects of the environment 3,72, routine statistics allow researchers, in a feasible way, to obtain objective data on a large geographic scale 76.

Only two papers characterized the environment with GIS-based measures using existent archival data. In high-income countries, geoprocessing techniques have been increasingly incorporated into studies on environmental correlates because of their ability to produce more sophisticated analysis 5,69,76.

A large majority of articles used self-reported measures for environment and for lifestyles. Other reviews have also found that perceived environmental attributes were more frequently used than objective measures 12,73,76. Concerning lifestyles, a similar trend was seen in a review on physical activity 13,73, whereas, for dietary behaviors, a recent review article showed that GISbased measures were the most common measures of the food environment 69. Given the divergence of results between subjective and objective measures found in recent literature reviews investigating different environmental attributes and lifestyles 12,73, the inclusion of both indicators has been strongly recommended 1,12 since this combination would aid to yield consistent data and improve understanding on interactions of people with the tangible environmental structure 5. In Brazil, particular attention should be placed on obtaining objective measures of physical and social environments since few studies are exploring this methodology. Additional steps should also be taken towards the simultaneous use of subjective and objective indicators.

Some studies used international instruments for measurement of environment that had not been validated in Brazil. For instance, based on the validated full version of NEWS in Brazil 45, some authors applied a modified short version of this questionnaire 17,33, whose validation was only carried out later by Florindo et al. 77. Since the instrument should be culturally significant and suitable for the Brazilian context in order to yield reliable, consistent findings, the validation of international questionnaires is particularly critical in the assessment of the links between lifestyles and environment in different settings.

Concerning micro- and macro-environment, other reviews have also showed that the former is the most studied 12,70. Neighborhoods and community settings were predominant among Brazilian studies and few studies focused on macroenvironment sectors, such as mass media, health campaigns and policies, and town planning. Therefore, despite the complexity in analyzing the diffuse and interconnected effects of the macro-environment 15, more attention should be drawn to this level. Regulations, laws, policies, institutional rules, and marketing strategies 15 exert a powerful influence in shaping food choices (including alcoholic beverage consumption) and attitudes and beliefs concerning smoking as well as engagement in active transport and recreational activities.

The small number of studies investigating the relationship between socioeconomic inequalities and physical and social environment in this review is of concern, since several studies conducted in high-income countries have pointed out that people living in deprived areas face more obstacles to make healthy choices 3,4,7,19,64. Failure to acknowledge and measure the social inequalities related to the environment can certainly hamper the full understanding of the relationship between environmental factors and health in a middle-income country, like Brazil.

The inclusion of socioeconomic aspects in the analysis of the impact of the environment on health has been done in two ways. The first is the investigation of how people with different socioeconomic status, for instance, perceive the environmental attributes in their neighborhood. An example of this analysis is the study of Cassou et al. 31 that, through focus groups, found that lowsocioeconomic status women perceived environmental factors as a barrier to physical activity more frequently than their high-socioeconomic status counterparts in Brazil. This data suggest that an increase in the availability of free or lowcost facilities, as well as investment in safety issues in public spaces might encourage poor people to be more physically active.

Another possibility has been to determine the geographic distribution of environmental attributes and analyze its relationship with health behaviors in light of social inequalities. A combination of (1) aggregate measures of the socioeconomic characteristics of people living in different areas (area measures related to the social context and deprivation), (2) spatial distribution of environmental attributes, and (3) individual-level health outcomes have been used by researchers in this field. The study of Jaime et al. 21, included in this review, illustrates this application. Through an ecological analysis of the relationship between environmental factors and lifestyles in São Paulo city, the authors found higher densities of food stores, public transport links, parks, and public recreational facilities in affluent areas, where overweight rates were lower. Such findings, which corroborate prior knowledge 3,70, reinforce the need for health promotion policies targeted at improving the physical and social environment in deprived areas, providing amenities and opportunities at affordable or no cost for the local population engaging in healthy lifestyles.

One third of the articles investigated gender differences in perceptions of the environment. Given the convincing evidence about the different patterns of the relationships between environment and lifestyles according to gender 11,72,78, there is no doubt that studying how women and men perceive and interact with their environment is important to the development of appropriate policies and programs to support health. For example, an article included in this review reported distinct associated environmental variables to the leisure-time physical activity for elderly men and women 17.

Missing from the Brazilian literature is the use of the key terms of physical and social environment-related approaches. Although all articles reviewed are clearly linked to this topic, few have used the terms: built, physical, social or perceived environment. Instead, authors have preferred to use generic terms, such as environment, environmental conditions, community environment, structural factors, and so on. One reasonable explanation for this is that the Brazilian scientific production on physical and social environment is still at a relatively early stage; as a result, many authors are only exploring some of the environmental correlates but are not identifying their work with other research affiliated to that research field.

Among the studies that used at least one of these terms, only half of them provided their own definition of the environment or cited other references to contextualize it. Indeed, few studies provided a clear conceptualization of how the selected environmental attributes may affect health behaviors. Another issue identified was a large degree of variability in the operationalisation of environmental factors. The lack of clarity about definitions of the environment and the variability in the measurements can be related to the absence of a well-articulated conceptual rationale. Therefore, the incorporation of theoretical perspectives should be considered as a top priority in the research agenda, since clear definitions are an essential component of a plausible conceptual framework or theoretical model that would guide the selection of the environmental measures, data collection, and the identification of important environmental influences for each health domain and population group 72.

Eighteen variables related to the physical environment were studied in the articles included in this review. The most often studied variable was the presence of recreational facilities. There is no doubt that the creation or revitalization of existent areas that are tailored to local needs, followed by the offer of specific programs in order to maximize the potential of this infrastructure, may enable physical activity 10,19. Understudied environmental factors should be incorporated into future studies to evaluate the presence and direction of association with lifestyles in the Brazilian context, such as density of different establishments in the neighborhood, air or noise pollution, access to and availability of fruits and vegetables, and so forth.

Concerning the social environment, safety from crime was the most often studied variable, which is not surprising given that this issue is clearly relevant in Brazil. Similar to studies conducted in other countries 73,79, Brazilian articles have demonstrated somewhat mixed results concerning the association between safety from crime and healthy behaviors. More investigations should be carried out in Brazil, considering both objective (e.g., presence of security guards, crime and homicide rates) and subjective measures (e.g., feelings of safety and vulnerability) in order to advance the methodological discussion and to verify to what extent individual perceptions can be associated with tangible aspects of the environment. Such knowledge may provide cues for the design of effective interventions aimed mainly at safe places where instead people feel unsafe and are unlikely to engage in physical activity. However, the need for more research should not delay policy development. Based on the convincing evidence in the international literature, governments at all levels should urgently take action in enhancing safety in public spaces, through strategies such as street lighting, policing and surveillance by public or private security guards, and maintenance of public amenities 1. Reducing fear of crime can not only foster engagement in a more active lifestyle, but also enhance a sense of belonging, improve social cohesion, and promote personal well-being 80.

Some aspects of the social environment have also been less explored, such as partnerships. Available evidence suggests that partnerships with sectors other than health play an essential role in funding collaboration; besides, it is a good strategy to conciliate political will with financial resources and experience 10,19.

Some limitations should be considered when examining our findings. Since some articles might not have reported all variables used in the research, it is possible some information has not been included in this literature review. However, given that many studies modified international instruments or developed their own questionnaires, this strategy was necessary in order to prevent the introduction of an information bias when well-known questionnaires were applied. Further, the lack of information provided about methodology, mainly in articles published in international journals, created some difficulties for compiling a more detailed description of methods employed in this field. Future studies should specify the methodological procedures regarding the technical aspects of the environmental attributes. With more detailed information, a comprehensive quantitative synthesis of findings through a meta-analysis could be performed and more replicated studies could be conducted for novice researchers in this area.

It must be also noted that this review was limited to the examination of the environment relative to lifestyle behaviors and obesity; therefore, further research should be expanded to include other health outcomes, such as indicators of health-related quality of life. It is worth mentioning that the current literature review identified a few studies investigating the influence of perceived environment on self-rated health and functional performance. In the international context, these well-studied research areas have added strong evidence to the literature by showing the influence of environment on physical functioning and mental health 3,19, as well as support to interventions in public health and urban planning.

This review also retrieved some articles focusing only on the description of programs aimed at changing the physical and social environment, which were not included because they did not meet our selection criteria. However, further research should synthesize the evidence available from the Ministry of Health's actions and other local initiatives led by policymakers in order to publicize ongoing programs countrywide and contribute to the information exchange about overcoming obstacles, successful strategies for the engagement of communities, development of partnerships, and so on. In addition, assessing the performance of these initiatives can better guide the planning of more effective strategies in the future, while also paying attention to their contextual distinctiveness.

By including only peer-reviewed articles, our findings are likely to be affected by the publication bias. In addition to unpublished theses and dissertations, we are aware that some evidence generated by political institutions is usually published in reports, conferences proceedings, and other grey literature, none of which were included in this review. Additionally, given the volume of investigations published in non-indexed scientific journals (mainly those in physical activity field), it is recommended that future research evaluates and weights the study findings regarding their individual scientific rigor.

The variety of instruments and cut-off points used to measure behavior outcomes and environmental attributes, coupled with the limited set of studies included in the present review, precluded us from performing a meta-analysis with the quantitative articles. Due to this heterogeneity, subgroup-specific summaries could also not be reported.

On the other hand, the studies reviewed were systematically identified through a comprehensive list of search terms. The search was not limited to the health related databases, but also included physical activity and social sciences search sources. In addition, our literature review involved other search strategies, such as culling the reference lists of studies retrieved in the electronic search.

To our knowledge, this systematic literature review represented the first effort to analyze the Brazilian scientific production related to the physical and social environment. Throughout the full scope of literature reviewed, some unaddressed issues were revealed and some recommendations were provided to fill this knowledge gap. Irrespective of the relatively early stage of the Brazilian literature on this topic and the limitations identified, its growth is promising, as is the slight diversification of the themes studied. Further replicated studies are needed to provide a full understanding of the relationships between physical and social environment and health lifestyles in different Brazilian contexts. Moreover, careful consideration should be given to the development of theoretical models that frame and guide the planning and analysis of studies in Brazil. More evidence to inform policy and practice is fundamental to make environmental surroundings a better place to grow, study, work, and age, providing real opportunities for every person to engage in healthy lifestyles.

Contributors

A. P. Belon proposed the article and performed the data collection, analysis, and writing of the manuscript.

C. Nykiforuk contributed substantially to the study design, data analysis and revision of the manuscript. All authors read and approved the final manuscript.

Acknowledgments

We thank Catherine Somerville (research assistant) for her careful work with the initial screening of the articles. A. P. Belon is funded by a postdoctoral fellowship from Capes/Brazil (9139/11-7).

Submitted on 01/Mar/2013

Final version resubmitted on 12/Jun/2013

Approved on 24/Jun/2013

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  • Correspondence

    A. P. Belon School of Public Health,
    University of Alberta. 3-256 Edmonton Clinic Health Academy,
    11405 – 87 Ave, Edmonton / AB – T6G 1C9,
    Canada.
  • Publication Dates

    • Publication in this collection
      14 June 2013
    • Date of issue
      Oct 2013

    History

    • Received
      01 Mar 2013
    • Accepted
      24 June 2013
    • Reviewed
      12 June 2013
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