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      Adequação do pré-natal e peso ao nascer: uma revisão sistemática Translated title: Adequacy of prenatal care and birthweight: a systematic review

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          Abstract

          Esta foi uma revisão sistemática da literatura de publicações em que o pré-natal foi investigado com uma das variáveis preditoras do peso ao nascer. Os bancos de dados MEDLINE, Cochrane Library e SciELO foram rastreados usando-se a combinação dos seguintes descritores: "prenatal care", "antenatal care", "quality", "adequacy", "birthweight", e "low birthweight". Foram localizados 25 estudos: 17 transversais, quatro coortes, três caso-controle e um ensaio randomizado. Os indicadores de adequação empregados foram os de utilização (quantitativos) e os de conteúdo do cuidado (de processo ou qualitativos). A maioria dos autores aplicou indicadores de utilização, principalmente o Índice de Kessner e o Adequacy of Prenatal Care Utilization Index. Somente dois estudos usaram critérios qualitativos. De modo geral, os estudos transversais detectaram efeito protetor do pré-natal sobre o baixo peso ao nascer, enquanto que os resultados de investigações com outros desenhos foram conflitantes. Os achados desta revisão evidenciam que o impacto do pré-natal sobre o peso ao nascer não é inequívoco, principalmente devido ao efeito do viés de auto-seleção. Há a necessidade de realização de ensaios randomizados para esclarecer essa relação.

          Translated abstract

          This was a systematic literature review on publications in which prenatal care was investigated as a predictive factor for birthweight. The MEDLINE, Cochrane Library, and SciELO databases were searched using a combination of the following uniterms: "prenatal care", "antenatal care", "quality", "adequacy", "birthweight", and "low birthweight". Twenty-five studies were found: seventeen had a cross-sectional design, in addition to four cohort studies, three case-control studies, and one randomized trial. The adequacy indicators related to utilization (quantitative measures) and content of prenatal care (process or qualitative indicators). Most authors employed quantitative indicators, mainly the Kessner Index and the Adequacy of Prenatal Care Utilization Index. Qualitative criteria were used in only two studies. Most of the cross-sectional studies found a protective effect of prenatal care against low birthweight, whereas results of studies with other designs were conflicting. This review's findings highlight that the impact of prenatal care on birthweight is not unequivocal, mainly due to the effect of self-selection bias. Randomized trials are needed to elucidate such a relationship.

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          An evaluation of the Kessner Adequacy of Prenatal Care Index and a proposed Adequacy of Prenatal Care Utilization Index.

          The assessment of the adequacy of prenatal care utilization is heavily shaped by the way in which utilization is measured. Although it is widely used, the current major index of utilization, the Kessner/Institute of Medicine Index, has not been subjected to systematic examination. This paper provides such an examination. Data from the 1980 National Natality Survey are used to disaggregate the components of the Kessner Index for detailed analysis. An alternative two-part index, the Adequacy of Prenatal Care Utilization Index, is proposed that combines independent assessments of the timing of prenatal care initiation and the frequency of visits received after initiation. The Kessner Index is seriously flawed. It is heavily weighted toward timing of prenatal care initiation does not distinguish timing of initiation from poor subsequent utilization, inaccurately measures utilization for full- or post-term pregnancies, and lacks sufficient documentation for consistent computer programming. The Adequacy of Prenatal Care Utilization Index offers a more accurate and comprehensive set of measures of prenatal care utilization than the Kessner Index.
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            The Adequacy of Prenatal Care Utilization Index: its US distribution and association with low birthweight.

            The proposed Adequacy of Prenatal Care Utilization Index is applied to data from the 1980 National Natality Survey to assess the adequacy of prenatal care utilization and its association with low birthweight in the United States. The index suggests that only 61.1% of women received adequate prenatal care, including 17.7% with more intensive care; 16.7% received inadequate care. More White women (63.4%) than Black women (51.9%) received adequate prenatal care. Low-birthweight rates were elevated among women with inadequate prenatal care and among those who received more intensive prenatal care.
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              Is antenatal care effective in reducing maternal morbidity and mortality?

              Women in developing countries are dying from simple preventable conditions but what impact can the procedures collectively called antenatal care having in reducing maternal mortality and morbidity? More importantly what is antenatal care? This review found that questions have been raised about the impact of antenatal care (specifically on maternal mortality) since its inception in developed countries, and that although the questions continue to be asked there is very little research trying to find answers. Many antenatal procedures are essentially screening tests yet it was found that there were very few results showing sensitivity and specificity, and that they rarely complied with the established criteria for the effectiveness of a screening test. The acknowledged gold standard measurement of effectiveness is the randomized controlled trial, yet the only results available referred to nutritional supplementation. This service of flawed methodology has been exported to developing countries and is being promoted by WHO and other agencies. This paper argues that there is insufficient evidence to reach a firm decision about the effectiveness of antenatal care, yet there is sufficient evidence to cast doubt on the possible effect of antenatal care. Research is urgently required in order to identify those procedures which ought to be included in the antenatal process. In the final analysis the greatest impact will be achieved by developing a domiciliary midwifery service supported by appropriate local efficient obstetric services. That this domiciliary service should provide care for women in pregnancy is not disputed but the specific nature of this care needs considerable clarification.
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                Author and article information

                Journal
                csp
                Cadernos de Saúde Pública
                Cad. Saúde Pública
                Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz (Rio de Janeiro, RJ, Brazil )
                0102-311X
                1678-4464
                October 2004
                : 20
                : 5
                : 1160-1168
                Affiliations
                [01] Pelotas orgnameUniversidade Federal de Pelotas orgdiv1Faculdade de Medicina orgdiv2Departamento de Medicina Social Brasil
                Article
                S0102-311X2004000500009 S0102-311X(04)02000509
                10.1590/S0102-311X2004000500009
                15486658
                e8d828cb-0e27-4397-8119-fb259b597239

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 27 April 2004
                : 01 October 2001
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 48, Pages: 9
                Product

                SciELO Brazil

                Self URI: Texto completo somente em PDF (PT)
                Categories
                Revisão

                Peso ao Nascer,Cuidado Pré-natal,Review Literature,Quality,Birth Weight,Prenatal Care,Literatura de Revisão,Qualidade

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