Health Index applied to the city of Araraquara, SP: an instrument to accompaniment the Primary Care

Augustus Tadeu Relo de Mattos Maria do Carmo G.G. Caccia-Bava Débora Cristina Modesto Barbosa About the authors

Abstracts

O aprimoramento do processo de avaliação da Atenção Básica, compreendida como organizadora de todo o sistema de saúde e não apenas como um nível assistencial, vem sendo almejado pelos gestores do Sistema Único de Saúde. O presente trabalho buscou identificar aspectos da assistência à saúde no município de Araraquara/SP, valorizando as características particulares presentes na área de adscrição de cada unidade de saúde. Adotando um indicador composto aplicado a cada unidade de saúde, o estudo visou contemplar a emergência de fenômenos favorecendo uma visão mais abrangente de cada unidade e distrito sanitário em relação à Mortalidade Infantil, Incidência de Tuberculose, Mortalidade por Causas Externas e Mortalidade Precoce por Doenças Crônicas. Valeu-se da metodologia desenvolvida no Índice de Saúde de Drumond Jr, obtido pela média dos valores dos componentes de cada Distrito de Saúde para os indicadores acima, agregando, ainda, a Taxa de Alfabetização e Rendimento Médio Mensal do Responsável pelo Domicílio. As áreas de abrangência das Unidades de Saúde foram classificadas segundo os valores obtidos na relação entre estes componentes. Os resultados apontaram diferenciais intraurbanos para a maioria dos componentes e revelou a presença dos piores valores nas Unidades de Saúde da periferia. O conhecimento dessa realidade pela gestão municipal é de fundamental importância para avançar no aprimoramento do processo de avaliação da Atenção Básica no município.

Avaliação em saúde; Atenção primária à saúde; Indicadores básicos de saúde; Desigualdades em saúde


The improvement of the process of evaluation and monitoring of the Primary Care Attention has been yearned by the managers of the different spheres in the context of the Unified System Health - UHS. Thus, in the order to identify the conditions of the health assistance in the city of Araraquara/SP, based on the particular features presented in the inscribe areas of each unit of health. It was adopted by means of a composed indicator aiming to favor a broader view which contemplates the emergency of phenomena from a more including vision. It was used the methodology developed in the Index of Health of Drumond Jr, whose final value of the Index is gotten by the average of the values of the components of each health district. To the components originally adopted - Coefficient of Infant Mortality, Coefficient of Tuberculosis Incidence, Coefficient of Mortality by External Causes and Coefficient of Precocious Mortality by Chronic Diseases - was still added in this study, the Tax of Alphabetization and the Monthly Nominal Average Income of Responsible People for the Domiciles. The 24 Units of Health had been classified according to values obtained in the relation among its components. The results point intra-urban differentials in relation to the majority of the components and lower values for the Health Units located at the periphery of the city. Knowing this fact municipal administration is of fundamental importance to progress in improving the process of evaluation of primary care in the county.

Health evaluation; Primary health care; Health status indicators; Health inequalities


Introduction

The development of the process of evaluation and monitoring of primary care actions, here understood as that which organizes the entire health system rather than being a health care level exclusively, has been the goal of managers from different Sistema Único de Saúde (SUS - Unified Health System) sectors. As a management tool, this evaluation enables the laying of the foundation for planning new actions, correcting directions and improving processes so as to achieve the expected goals1.

According to Mendes2, the traditional evaluation model can only be overcome with the incorporation of new variables, such as quality indicators and institutional forum decisions (such as regional and municipal health councils), used as powerful integration and implementation resources for municipal health policies. As a result, needs can be met and expenses can be rationalized through effective social control.

Primary care adopted the Primary Care Indicators Pact, launched in 1999, as an important form of assessment. Currently, this incorporates the dimensions of the Health Pact, which is one of the main evaluation and follow-up instruments with a national scope, established from the negotiation of goals that represent the intention of managers to improve health care quality3.

However, inequalities present in our society create differences - avoidable, systematic and unfair - in the living and health conditions of individuals from the different districts of Brazilian cities and regions, which can be observed in the distribution of health problems. In this way, it can be concluded that the populations are not randomly distributed in the different sectors of a city, but rather tend to group together in clusters that share relatively similar characteristics of a social and economic nature. These differences create segregated spaces that routinely change life in these locations and, consequently, transform life in the city as a whole4.

The integration of several social indicators in the construction of a composite evaluation index can enable a detailed analysis of health care in the area covered by Health Units, where data disaggregation based on the local reality allows the identification of needs for different interventions among distinct areas, justifying priority investments in those areas with more relevant social and health problems.

Minimum geographical disaggregation must be a commitment between obtaining an area which is sufficiently small to be homogeneous and sufficiently large to provide an adequate number of events for analysis4 which can distinguish different needs.

In this way, it is justifiable that epidemiological data analysis is disaggregated among sectors of a city, so that these differences can be considered in the formulation of policies compatible with intra-urban diversity5, considering that social exclusion is the impossibility of sharing the benefits produced by society, causing one to experience deprivation, refusal, abandonment and expulsion.

This is not an individual process, although it reaches people, but rather a logic which is present in the several forms of economic, social, cultural and political relations. This situation of collective deprivation is what can be understood as social exclusion6, which, according to the WHO World Report, derives from a social structure that creates inequalities which also affect health system inequalities.

The majority of health services, from hospitals to primary health units, have very distinct forms of providing health care, especially in terms of quality, which results in inequality, particularly for those who need it the most7.

In the search for methodological innovations that can include the variety of conditions associated with health inequalities, researchers assume they could use a composite index that considers this plurality, evidencing the inequalities in a given area, and that helps to plan, monitor and assess health actions, guiding interventions so as to reduce these inequalities8.

A composite index is a measure that associates different variables into a synthetic reference to analyze the characteristics of population groups in certain geographical areas. Its composite nature enables the plurality of perspectives in its development9.

According to Mendes2, composite indices are instruments that enable phenomena occurring in specific geographical areas to be revealed, categorizing them into variables that reflect the material or social circumstances of a certain phenomenon expected to be analyzed. The distribution of the population in the urban space follows unequal patterns: on the one hand, there is the city's periphery without urban infrastructure and occupied by impoverished groups with low income and worse health conditions; on the other hand, there are areas with full access to urban facilities that are occupied by high-income groups with better health conditions4. An example of a composite index is the Índice Paulista de Vulnerabilidade Social (IPVS - State of São Paulo Social Vulnerability Index), which enables a more accurate view of living conditions, geographically identifying the population segments that are more exposed to poverty and other vulnerability factors. Consequently, this index uses the socioeconomic and family life cycle dimensions as its parameters10.

A study that considers inequality, social exclusion and quality of life from epidemiological data is not only a diagnostic, but also an intervention instrument. Thus, the present study is justified, aiming to analyze the health conditions of the city of Araraquara, in the state of São Paulo, in 2004, with the application of the Modified Health Index11.

Methods

A descriptive study was conducted in the city of Araraquara, in Southeastern Brazil, with the application of a new methodology, based on the Drumond Jr. Health Index11, whose components are as follows: Child Mortality Coefficient (CMC), Tuberculosis Incidence Coefficient (TIC), External Cause Mortality Coefficient (ECMC) and Early Mortality Coefficient due to Chronic Non-Communicable Diseases (MCCD) in the population aged between 20 and 59 years. The methodology used in the construction of the Human Development Index (HDI), a general, synthetic and composite index, was followed.

The following two new components were incorporated into the Drumond Jr. Health Index: Head of Household Literacy Rate (HHLR) and Head of Household Nominal Average Income (HHAI), resulting in a new index described as Modified Health Index (MHI). The choice for the inclusion of these two indicators was made to further characterize knowledge about the characteristics involved in the health-disease process, present in different regions.

The traditional population base is 1,000 live births for the CMC, while a population base of 100,000 individuals was used for the TIC, ECMC and MCCD.

Distance and discrepancy were calculated to obtain the MHI. Distance is the measure between the value obtained for a Health Unit and the lowest value found for the city, whereas discrepancy is the difference between the highest and lowest values obtained for the city. Conceptually speaking, this relationship indicates where the actual situation of a certain area, covered by a Health Unit under analysis, stands in relation to the expected health condition goal for the city12.

According to Samohyl13, the distance can be understood as the general amplitude of the data series (amplitude is a dispersion measure calculated as the difference between the highest and lowest values of a set of data) and discrepancy as the measure that seeks to establish a degree of approximation to the concrete living conditions of a population in the different sectors of a city or region, translating this into quantitative terms and showing the size of existing inequalities14.

The value of each component was obtained from the distance/discrepancy ratio. Thus, it was possible to construct a synthetic index whose result aims to identify inequalities in the area studied14.

This formulation was applied to the six components previously mentioned, listed for each of the 24 Health Units, where the index value should be between zero and one. Consequently, the Health Unit with the worst situation was given a value of zero and that with the best situation was given a value of one for each of the six MHI components. The remaining Health Units were given intermediate values. Finally, the value attributed to the MHI was calculated as the arithmetic mean of values obtained for each of the six components.

The aggregation of these six components reflects the priority aspects of health policy, including certain economic and social aspects that, as a whole, aim to synthesize a reality that includes health and living conditions. It should be emphasized that this methodology is appropriate to compare intra-urban differences in a city, but not for the comparison between cities and regions. It enables one to observe, throughout the years, the performance or the mobility of the areas studied based on the interventions or changes made11. As proposed by Drumond Jr., this study did not attribute different weights to indicators, because all of them included relevant health aspects.

The area of coverage of each Health Unit is defined by the City of Araraquara Department of Health, based on the confluence of the following criteria: the population size to be cared for by a certain unit, the technological density and installed capacity of this unit, and the cultural tradition of the population to be cared for in a certain location. Family Health Strategy Units follow the Ministry of Health parameter of one team per each 1,000 families or approximately 3,500 individuals. The area of each unit is geographically delimited and census tracts are used as the basis to define the population size. All epidemiological information generated by the official information systems of the City of Araraquara Department of Health enabled it to be gathered according to the area of coverage of each Health Unit, from which data were extracted. The place of study, the city of Araraquara, in the state of São Paulo, is the headquarters of the regional health management office, comprised of 25 cities for which it is a benchmark. This city is structured into three District Health Units and it is located in the center of the state of São Paulo, with an estimated population of 191,896 inhabitants in 2004. Its literacy rate was 94.8% in 2000. It should be emphasized that the existing records in the literature15,16 point to flaws in all stages of the information generation process, from the system's input to its use. The large number of deaths from ill-defined causes can exemplify the vulnerabilities of the mortality indicator information system. Approval was obtained from the Research Ethics Committee and the City of Araraquara Department of Health. Data were subsequently collected from the Public Health Branch of the City of Araraquara Department of Health, between January and December 2004. In addition, data from the 2000 Census conducted by the Instituto Brasileiro de Geografia e Estatística (IBGE - Brazilian Institute of Geography and Statistics) were used.

Results

The following results obtained from each component analyzed are shown here to emphasize the fact that the distance/discrepancy ratio seeks to indicate where the actual status of a health unit under analysis stands, in relation to the expected goal of health condition for the city of Araraquara.

The Child Mortality Coefficient (CMC) was 9.78 deaths per 1,000 live births, thus showing a reduction when compared to the values found in the study by Mattos and Caccia-Bava17, which pointed to the occurrence of 11.46 deaths per 1,000 live births in 2002. Among the health units of this city, there was a variation between zero and 29.85 deaths per 1,000 live births. A total of 2,277 births were taken into consideration to calculate the CMC in 2004.

The Early Mortality Coefficient due to Chronic Non-Communicable Diseases (MCCD) was 100.7 deaths per 100,000 inhabitants. Of all 265 deaths from Systematic Arterial Hypertension (SAH) and diabetes in the population aged more than 20 years, 100 occurred in the population aged between 20 and 59 years, of which 91 are associated with SAH and nine with diabetes. Of all 100 deaths, four occurred in the rural area population. The remaining 165 deaths occurred in those aged more than 59 years. The present study excluded deaths associated with hypertension and diabetes mellitus occurring in the rural population, totaling four deaths among 6,984 inhabitants. These deaths were excluded because they were not formally registered with any of the 24 Health Units of the city of Araraquara, hindering the association of the events with specific units. Thus, a total of 96 deaths were considered to calculate this indicator, which corresponds to the total number of deaths from systemic arterial hypertension and diabetes mellitus. The ECMC was 51.59 deaths per 100,000 inhabitants, varying from zero to 109.7 deaths per 100,000 inhabitants. There was a total of 99 deaths from external causes, of which two were in the rural area and seven in ignored districts, as the City of Araraquara Department of Health's information system could not associate these events with any health units.

The TIC was 30.22 cases of tuberculosis per 100,000 inhabitants. Among Health Units, such coefficient varied between zero and 90.7 cases of tuberculosis per 100,000 inhabitants. In the state of São Paulo, in 2004, this incidence was 45.9 cases per 100,000 inhabitants, according to the Alexandre Vranjac Epidemiological Surveillance Center18.

The HHAI showed values varying between R$ 302.89 and R$ 1,781.83 in the area of coverage of the 24 Health Units, according to the 2000 Demographic Census.

The HHLR was calculated from the percentage of individuals aged more than 15 years who could read and write a simple note and varied between 68.2 and 97.8%, according to the 2000 Demographic Census.

The distance/discrepancy ratio was applied to each study component to calculate the arithmetic mean among these components, obtaining MHI values for each Health Unit varying between 0.38 (worst performance) and 0.81 (best performance).

Discussion

Areas with small populations and, consequently, few deaths are susceptible to a great variation in mortality rates and other indicators, resulting from random fluctuations. These fluctuations can interfere with the results when short periods of time are analyzed. Thus, the ranking of a certain area can be drastically changed from year to year, the reason why the absolute values of each component and their individual ranking were sought to be obtained before the synthesis of the MHI indicators could be shown.

After the MHI methodology was applied, considering the six components adopted for the analysis, the final ranking of Health Units was obtained, as shown in Table 2 and its cartographic representation in Figure 1.

Figure 1
Mapping of the Synthesis of Components in order of Rating Units in Health Health Index Modified for Drummond, Jr., second coverage area, Araraquara, 2004.

Based on the results obtained, the following aspects can be initially used for reflection: among the 24 Health Units, 11 did not have child deaths and would, consequently, require a historical analysis of this indicator. In a similar study performed by Drumond Jr.19 in the city of São Paulo, this component varied between 7.2 and 55.2 deaths per 1,000 live births. Important intra-urban differences were observed for this component, according to the areas of coverage of Health Units. Of the five Units with the poorest results, i.e. a CMC higher than 20 child deaths per 1,000 live births, four units were located in peripheral urban areas (PSF Águas do Paiol, CMS Selmi Dei I, PSF Maria Luiza, CMS Yolanda Ópice). Additionally, 11 Health Units had child deaths, seven of which were Family Health Strategy Units. Aiming to make a more in-depth assessment of this coefficient, it should be taken into consideration that the population of the respective areas is small, justifying the importance of making comparisons throughout the years using this methodology.

By analyzing this indicator in a study that included seven cities of the state of São Paulo, Cruz20 observed that the implementation of the Family Health Program was one of the factors that contributed to the reduction in child mortality rates in these cities. The areas with higher social vulnerability found with the IPVS for the city of Araraquara - SEADE21 coincide with the areas of coverage with the poorest results for the child mortality component, pointing to the peripheral distribution of this event.

Although the IPVS adopts components that are different from those used by the MHI, both enable health sector dimensions to be made explicit in relation to wider social aspects. In this way, what is at issue is not proposing the adoption or exclusion of a benchmark over another, but rather their association to give a better picture of a given social reality which is complex and multi-faceted.

The TIC among Health Units varied between zero and 90.7 cases of tuberculosis per 100,000 inhabitants. In the study conducted by Drumond Jr.19 in the city of São Paulo, using the same methodology for this city's Health Districts, such component varied from 32.5 to 113.5 cases of tuberculosis per 100,000 inhabitants. The following are among the Health Units with the six worst results, i.e. a TIC higher than 50 cases per 100,000 inhabitants: CMS Jardim Iguatemi, CMS Laranjeiras, PSF Biagioni, CMS Vila Xavier, PSF Ieda, and CMS Parque São Paulo. The areas covered by these four units are located in the city's periphery and correspond to the IPVS map of areas with greater social vulnerability. A total of five out of the six units without tuberculosis cases were Family Health Strategy Units.

The MCCD was 100.7 deaths per 100,000 inhabitants. In the present study, it varied between zero and 100% among the areas of coverage of Health Units, i.e. there were two Units where all deaths from systemic arterial hypertension and diabetes occurred in the population aged between 20 and 59 years. The study conducted by Drumond Jr.19 showed a variation for this coefficient from 7.2 to 55.2% among the health districts of the city of São Paulo. A total of 11 Health Units had coefficients higher than the mean value of the city in 2004, which also coincided with the IPVS map of areas with greater social vulnerability.

Figure 2
Cartographic representation of the State Social Vulnerability Index for the urban area of Araraquara in 2000, modified with overlapping coverage areas of health units in the year 2004.

The ECMC was 51.59 deaths per 100,000 inhabitants. The present study showed results between zero and 109.7 deaths per 100,000 inhabitants.

Findings from the study by Drumond Jr.19 in the city of São Paulo in 2004, which used the same methodology, showed a variation among Health Districts between 32.7 and 101.8 deaths from external causes per 100,000 inhabitants. A total of 13 out of the 24 Health Units had ECMCs higher than the mean value of the city of Araraquara, of which 11 correspond to the city's peripheral areas, which are those with greater social vulnerability according to the IPVS.

The city of Araraquara had a literacy rate of 94.8% in 2000 according to the IBGE. The results of the present study point to a variation between 68.2 and 97.8% among Health Units. Despite the city's good performance, it should be emphasized that there were important differences when intra-urban areas were observed individually. Populations with a low level of education usually have poorer living conditions, as they encounter greater difficulties to obtain employment and health care, among other things. Consequently, vulnerability is expected to increase as the head of households' level of education decreases21.

There were significant differences in HHAI varying between R$ 302.89 and R$ 1,781.83. The city's per capita income in 2001 was R$ 441.8821. When this component is taken into consideration, inequalities in this area were also followed by worse performances of the other study components, thus pointing to a close relationship among them. The importance of income for health indicators is pointed out by the WHO22 World Health Report, where the global trends of child survival and in life expectancy are described. The increase in inequalities in income means greater inequality in child survival. This unequal growth pattern reflects on the increasing disparities between healthier and less healthy individuals.

Additionally, the worst results for HHLR and HHAI coincided with the IPVS map of most vulnerable areas. When health-related variables were exclusively considered, there appeared to be no changes in performance in the comparison with the IPVS study, which used socioeconomic condition and family life cycle variables as components. A total of six out of the seven Health Units with the worst results in the study were found in the areas categorized between average and very high vulnerability. When the IPVS and MHI cartographic representations were overlapped, areas of coverage whose census tracts were ranked with values higher than 3 (i.e. 4, 5 and 6 - average, high and very high vulnerability) in the IPVS correspond to the city's peripheral areas, where seven out of the eight Health Units with the worst MHI rankings coincide with the most vulnerable areas in the IPVS. The final results obtained from the Health Units in the MHI varied between 0.38 (worst performance) and 0.81 (best performance), showing the important differences in these units' performance capacity in the sense of seeking health care equity. This is because Health Units have very distinct ways of providing health care, particularly in terms of quality, thus creating inequality, especially among those who most need it7.

Table 3 shows the comparison between the values obtained from the ranking of the area of coverage in the MHI and the ranking of the same area in the IPVS, in 2000.

The results found in the present study are in agreement with what has been proposed by Akerman8, who emphasizes the relevance of problems encountered in cities not being approached individually to produce results capable of providing answers to people's needs. Mendes' proposals2 go in the same direction, pointing towards the need to use composite indicators that show intra-urban differences, taking into consideration the phenomena of interaction and synergism among the components used in the study and emphasized by the IPVS study.

These results highlight Akerman8, according to whom the use of composite indicators can be a strategy to show the differences in urban spaces, seeking needs, possibilities of solutions and paths to equalize such differences. Tobar et al.23 considered three basic dimensions to reduce social inequalities: access to health services, equality in the provision of financial resources, and equality in the results, i.e. social classes must reach equal results regardless of their socioeconomic conditions. Equality is here understood as the overcoming of avoidable differences caused by social injustices.

These results, pointing to important differences among the areas of coverage of Health units, especially in peripheral areas, open new possibilities for the city of Araraquara to identify and implement solutions in order to minimize and equalize these differences, following the path of equity.

Final Considerations

The present study focused on the analysis of the health conditions of a city in the rural area of the state of São Paulo, considering composite indicators and selecting epidemiological variables relevant for collective health, capable of revealing social and health aspects present in the disease-health-care process.

Each of the components used revealed patterns of health inequality where the worst results coincided with the city's peripheral areas, which corresponded to those with greater social vulnerability indicated by the IPVS.

The MHI is a composite indicator that enabled both the group analysis of its components and the individual assessment of each of them and per area of coverage of Health Unit, further approaching the local reality. This approach can enable a more accurate assessment of the risks inherent in health and the poverty to which individuals are exposed. This was possible through the use of health indicators that are powerful instruments in the monitoring and evaluation process to identify health inequalities among different areas.

When the impact of local and regional inequalities in health care and living conditions of individuals is evidenced, especially in Primary Care in its broadest sense, there is an emphasis on the understanding that different needs from distinct social groups have repercussions on the process of falling ill and dying of these groups and individuals.

It is believed that the effort made to systematize and produce knowledge about this reality can become an immediate contribution to the city of Araraquara, including not only this city's Department of Health on its several management levels, but also health professionals and the active community who face the challenge of unequal health care on a daily basis.

Additionally, the use of this methodology can serve the realities of other cities or services, which will be able to take advantage of local and regional indicators through components that translate their reality, experience or need. Therefore, more subsidies will be available for them to reflect on the elements that result in different health care performances and to implement this proposal as a permanent evaluation and monitoring instrument in the areas of coverage of their services.

The following were some of the limitations of the present study: to be conditioned to the quality and accuracy of the available database; to have used a short period of time (one year) as reference; to not enable comparisons to be made among the results obtained from cities with different realities. Some of these limitations can be overcome with new and more specific studies, whereas others can be overcome with the formation and incorporation of a new evaluation approach.

As immediate recommendations to the municipal management, the following aspects stand out: the importance of more integration between social areas and inter-sectoral actions and partnerships; the development of the Family Health Strategy; and investments for the improvement of the information system, with the adoption of technological resources that enable one to work on information with the lowest level of data disaggregation possible, so that the understanding of the local reality is developed and the social control of this reality is increased.

Another possibility that can arise from studies of this nature is that of serving as benchmark for the routine follow-up of performance results of different Health Units, by observing variations in the ranking of these services, as the changes in their different components are included.

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  • It was approved by the Research Ethics Committee under official expert opinion 183/ CEP-CSE-FMRP-USP

Publication Dates

  • Publication in this collection
    Mar 2013

History

  • Received
    24 Jan 2011
  • Reviewed
    13 Jan 2012
  • Accepted
    24 Apr 2012
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