EVALUATION OF PRENATAL CARE AT BASIC HEALTH UNITS IN THE CITY OF SAO PAULO

The aim of this study was to evaluate the quality of prenatal care offered in 12 Basic Health Units (BHU) in the city of Sao Paulo, Brazil, through a review of medical and nurse charts, before and after the municipalization of the public health system. The indicator used considered excellence in care as: starting prenatal care in the first quarter of pregnancy; at least six medical visits; at least two results of blood screening for syphilis and one for HIV; returning to BHU up to 42 days after delivery. This indicator was not present in any care delivered in 2000, and only 7.7% of the care delivered in 2004 obtained it (1.1% to 30% of the care per unit assessed). Although there was an evident improvement in care during the period, the low proportion of excellent prenatal care shows an urgent need to improve this care in the BHU of São Paulo city.

The aim of this study was to evaluate the quality of prenatal care offered in 12 Basic Health Units (BHU) in the city of Sao Paulo, Brazil, through a review of medical and nurse charts, before and after the municipalization of the public health system.The indicator used considered excellence in care as: starting prenatal care in the first quarter of pregnancy; at least six medical visits; at least two results of blood screening for syphilis and one for HIV; returning to BHU up to 42 days after delivery.This indicator was not present in any care delivered in 2000, and only 7.7% of the care delivered in 2004 obtained it (1.1% to 30% of the care per unit assessed).Although there was an evident improvement in care during the period, the low proportion of excellent prenatal care shows an urgent need to improve this care in the BHU of São Paulo city.DESCRIPTORS: prenatal care; quality of health care; syphilis, congenital; HIV

INTRODUCTION
Prenatal care is defined as the set of clinical and education procedures to follow-up pregnancy evolvement and to promote the health of pregnant women and their infants.To assess the quality of this care with a view to its improvement demands constant efforts from health authorities, professionals performing these actions as well as from the target population, which should be aware of possible problems and seek help.
In Brazil, epidemiological surveillance has managed to appoint problems; however, it has not been able to enhance the feasibility of prevention measures (1)   .An assessment of prenatal care quality and the problems resulting in newborns with congenital syphilis in 41 Basic Health Units (BHU) in the city of São Paulo (3) in 2000 concluded, among other points, that the care delivered to pregnant women in most units under study does not meet the Ministry of Health requirements (4).The creation of quality indicators in this survey enabled us to identify problems, to assess the introduction of public policies in health, to organize services to monitor preventive actions in prenatal care, and to attempt to eradicate and/or control the possible adverse outcomes for pregnant women and their children .
The objective of the present study was to assess, using quality indicators, the quality of prenatal care offered in basic health units of the city of São Paulo, comparing distinct periods: 2000 (before) and 2004 (four years after the municipalization of health services).

MATERIALS AND METHODS
This is a descriptive cross-sectional epidemiological study, assessing charts of pregnant women.In the present study, we used a sample of 12 BHU, randomly chosen among the 41 BHUs that were part of our previous study (2)  Based on the guidelines by the Ministry of Health (4) , the following was considered as adequate prenatal care: beginning of follow-up in the first quarter of pregnancy; at least six visits; record of at least two screenings for syphilis (VDRL); record of screening for Human Immunodeficiency Virus -HIV; returning to the BHU up to 42 days after delivery.An index was built, using the relationship between the number of pregnant women whose prenatal followup at the unit met all these items (adequate or excellent prenatal care) and the total number of pregnant women seen in the period.All data available in the charts were used: medical and nursing notes, and results of laboratory exams (taken from medical charts and in the records of the SisPreNatal system).
After collection, selected variables were summarized as figures and percentages for qualitative Evaluation of prenatal care at basic health units in the city… Succi RCM, Figueiredo EN, Zanatta LC, Peixe MB, Rossi MB, Vianna LAC.

RESULTS
Patients in prenatal follow-up at the 12 units (identified by numbers 1 to 12) totaled 818 pregnant women in 2000 and 1299 women in 2004, ranging from 41 to 147 pregnant women/BHU in 2000 and 40 to 299 pregnant women/BHU in 2004.The number of prenatal medical visits in 2004 was higher than in 2000 at all BHU but one.The care model at the units assessed was the following: seven Basic Health Units (BHU), four mixed units (BHU + Family Health Program -PSF), and one with FHP-type care.
The mean and standard deviation of the number of medical visits per pregnant woman at the units ranged from 4.6± 1.9 to 6.8 ± 3.2 in 2000 and from 3.9 ± 1.8 to 6.5± 3.2 in 2004.Comparing the two years studied, these means were different (with statistical significance) in only three units: in units 2 and 6, there was a decrease in the number of medical visits (6.1± 2.1 to 4.9±2.0 and 6.8±3.2 to 4.7± 2.7; Student's t test, p=0.007 and p < 0.001 respectively) and, in unit 9, there was an increase in the number of medical visits (4.8± 2.3 to 5.5 ± 1.8; Student's t test, p= 0.048).Marginally significant differences in the mean number of visits were observed with decrease in one unit and increase in three.
The proportion of pregnant women going to nursing visits was small at all BHU, ranging from 0.70% to 28.20%.The total number of visits performed, adding up medical and nursing visits, is shown in Table 1.The ratio of pregnant women performing follow-up until the third trimester of pregnancy decreased in the study period: from 711/818 (86.90%) in 2000 to 962/1299 (74.00%) in 2004.
Three units presented a significant decrease in this ratio and only two presented an increase.However, this difference was not statistically significant.
At least, one blood test for syphilis was performed during prenatal care in 76.70% (628/818) of the pregnant women followed in 2000, and in 86.00% (1117/1288) in 2004.Table 3   Performance of at least one blood test for syphilis in 100% of the pregnant women seen was obtained in only 2 units in 2000 and in 11/12 (92%) in 2004.The ratio of pregnant women performing the two screenings recommended ranged from zero to 25% in 2000 and from 3.60% to 69.20% in 2004.The ratio of pregnant women undergoing a blood test for syphilis increased significantly at 5 units, although only 2 BHU performed at least one test in all pregnant women seen in the two periods.One unit still presented, in 2004, 17.20% of prenatal charts with no records for syphilis screening.
Prevalence of HIV-infected pregnant women was 3.70% in 2000, decreasing to 0.60% in 2004.
There was an increase in the ratio of HIV blood tests performed from 2000 (510/818) to 2004 (1096/1299); this difference was statistically significant in five units (p<0.05).In 2004, more than 80.0% of pregnant women seen in all units performed this test.Distribution of pregnant women undergoing HIV blood test in the health units studied is shown in Table 4.
In the assessment conducted in 2000, none of the 818 pregnant women followed returned to the BHU in the first 42 days after delivery.In 2004, 1239 pregnant women had a record of this information in their medical charts, and 481 of them (38.80%)returned to the BHU within this period, however, in only 4 BHU, over 50% of the pregnant women were assessed in the puerperal period.
The excellence indicator was achieved by only 100 of the 1299 pregnant women assessed in 2004 (7.70%) (Table 5).In 2000, this indicator was not obtained because they did not return to the BHU within 42 days after delivery.

DISCUSSION
Health promotion of pregnant women and their fetus should involve good prenatal care, which is considered one of the best indicators of obstetric and neonatal outcomes of pregnancy (5) .This care, considered as a priority in public health, aims at decreasing maternal/child morbidity and mortality (6), and is characterized preventive and educational actions (frequent and planned contact of pregnant women with health services) and by the identification of risk situations for pregnant women and their fetus, with early and timely intervention in problems affecting pregnancy.The introduction of the prenatal care program, with the implementation of the Programa de Atenção Integral à Saúde da Mulher (Program for Comprehensive Health Care to Women -PAISM) in the 80's, brought about significant changes, such as the increase in coverage and in the average number of visits, as well as early start of prenatal follow-up (2) .
An increase in the number of prenatal appointments was observed in all but one BHU assessed, in the two periods studied.Although we do not have access to the number of inhabitants of each area covered by the units, a 58.8% increase in the number of pregnant women receiving prenatal care (818 in 2000, and 1299 in 2004) can be assumed, which is not a result of population growth alone (either the population as a whole or especially the number of women of fertile age); data obtained suggest greater accessibility of prenatal care.
According to the Ministry of Health, the ideal situation is to start prenatal follow-up in the first quarter of pregnancy and to have six or over appointments during pregnancy (4) .Comparing care in 2000 and 2004, we observed that 8 of the 12 BHU assessed in 2004 presented an average of medical appointments below six, as well as a statistically significant decrease in the number of appointments performed in two units.Although the number of nursing appointments is very low in all BHU assessed, when the total number of appointments performed was considered (physicians + nurses) there was an increase in the ratio of pregnant women reaching the minimum amount of appointments recommended in half of the BHU.However, only 52.70% of the pregnant women seen in 2004 (685/1299) had reached this number of appointments and, at 3 units, the ratio of pregnant women with this indicator was lower than 50% (Table 1).
The higher number of prenatal visits and early care to pregnant women are associated with: greater intrauterine growth and lower rates of neonatal morbidity and mortality, preterm births, low birth weight and maternal deaths (7)(8)(9)(10)(11) .The beginning and end of follow-up is an important marker of prenatal quality, which should start ideally in the first timester of pregnancy and continue until the 3 rd trimester.Early start is important especially to decrease maternal morbidity and maintaining care until the 3 rd trimester favors identification of possible perinatal risks, enabling timely interventions.The ratio of pregnant women seen in the units assessed who started prenatal care in the first trimester of pregnancy increased in the studied period (Table 2), however, maintaining this care until the end of pregnancy, which was assessed by the number of pregnant women going to visits in the last trimester of pregnancy, was worse in 2004 when compared to 2000.The increase in the proportion of early prenatal care may result from the number of pregnant women followed-up, as a whole, but the loss of follow-up until the end of pregnancy may be a consequence of lack of encouragement from the family, which is not aware of the benefits of followup.On the other hand, it can also be due to changes in the women's address, which is very common in this population.However, whatever the causes may be, loss of follow-up may lead to risk for motherschildren and actions are necessary to correct this problem.
A small number of prenatal visits results in missed opportunities to prevent disorders in pregnancy, especially infectious diseases (5) .Syphilis and HIV were the two infectious diseases used to assess quality in prenatal care in the present study.
Although the Ministry of Health recommends two blood tests for Syphilis (VDRL) during prenatal follow-up and considers up to one case for 1,000 live births the goal to end congenital Syphilis, a study performed in 2004, with a sample representing pregnant women from 15 to 49 years old from all regions of the country, observed a prevalence rate of 1.6% for active Syphilis (12) .The number of pregnant women with active Syphilis was estimated at 50,000 and the number of live births with congenital Syphilis at 12,000 (considering a 25% vertical transmission rate) in 2004, with a different prevalence in each region of the country, ranging from 1.9% in the Northeast to 1.3% in the Central-West (12) .
Although the ratio of units screening for  (16) , who suggested collective prenatal consultations, could prioritize the principle of integrality and citizenship, favoring providing humane and total care to women.
variables and as mean ± standard deviation for quantitative variables.Comparisons between the two years of the study were made in each of the units assessed, using Chi-Square or Fisher's exact test for qualitative variables and Student's t test for quantitative variables.This survey was funded by CNPq (National Council for Scientific and Technological Development) (public notice 036/2004), and approved by the Research Ethics Committee of the Federal University of São Paulo and the Health Secretariat of the city of São Paulo.
Syphilis at least once increased from 2000 to 2004, the ratio of pregnant women with the two recommended tests continued very low (3.60% to Municipalization of health services seems to be important in this change, although we could not correlate it with the influence of the care model introduced (family health program, traditional health unit or mixed units).We should highlight, h o w e v e r, t h a t d i f f i c u l t i e s f o u n d i n a s s e s s i n g temporarily care in a certain region covered by the Family Health Program, since increase in the areas of coverage of a unit from the FHP results in a n e w i d e n t i f i c a t i o n n u m b e r o f h o m e s a n d i n d i v i d u a l s , m a k i n g i t i m p o s s i b l e t o p e r f o r m longitudinal follow-up of users of the service.The recent proposal by Penna and col

Table 1 -
Distribution of the number of pregnantPre-natal follow-up was started in the first trimester of the pregnancy for 459/818 pregnant women (56.10%) in 2000, ranging from 39.60% to 85.00% at the 12 BHU studied (Table2); in 2004, this ratio ranged from 37.20% to 80.80%.In total, there was a significant increase in the number of pregnant

Table 2 -
Distribution of the number of pregnant women that started prenatal in the first trimester of pregnancy according to Year and Health Unit # Chi-square

Table 3 -
Distribution of health units according to number of pregnant women performing two VDRL screenings or more, City of São Paulo, 2000/2004 #Student's t test.

Table 4 -
Distribution of the number of pregnant women undergoing blood test for HIV per health unit,

Table 5 -
Number of pregnant women presenting the