Temporal evolution of the risk factors associated with low birth weight rates in Brazilian capitals (1996-2011).
Temporal evolution of the risk factors associated with low birth weight rates in Brazilian capitals (1996-2011).
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DOI：
10.1186/s12963-016-0086-0
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发表时间：
2016
影响因子：
3.3
通讯作者：
da Silva CH
中科院分区：
文献类型：
--
作者：
de Souza Buriol VC;Hirakata V;Goldani MZ;da Silva CH
分析 1996 年至 2011 年间巴西各州首府低出生体重 (LBW) 的趋势及其决定因素。我们旨在确定研究期间哪些变量与 LBW 相关。这是一项横断面研究，使用了来自 26 个州首府和巴西利亚（联邦首都）国家活产信息系统的数据，分为五个地理区域。根据每个变量，采用平均年变化百分比（AAPC）评估低出生体重率可能的时间趋势，同时考虑所有地区和单独考虑每个地区，并计算泊松回归以证明低出生体重的时间趋势以及该期间变量（年龄和受教育水平、产前检查、分娩类型和胎龄）的影响。还使用泊松回归一起分析所有变量。在本研究中使用的 11,200,255 名活产总数中，活产数量显着减少，特别是在较发达的地区。低出生体重率为8%，期间保持稳定。从地区趋势看，东南部和南部地区发病率较高，华北、东北和中西部地区发病率明显较高。孕产妇教育和产前保健覆盖面的改善降低了所有地区低出生体重的风险。此外，所有地区的剖腹产率均有所增加，但对低出生体重率的影响较小。研究期间，教育和医疗保健的改善降低了巴西所有地区低出生体重的风险。低出生体重率的趋势及相关因素因地区而异，显示巴西人口、流行病学和发展转型的不同阶段。本研究得到了阿雷格里港医院研究伦理委员会的批准（协议 120323）。
To analyze the trend of low birth weight (LBW) and its determinants in Brazilian state capitals between 1996 and 2011. We intended to determine which variables are associated with LBW during the period studied. This is a cross-sectional study that used data from the National Information System of Live Births from 26 state capitals and Brasilia (the federal capital), divided into five geographical regions. The Average Annual Percentage of Change (AAPC) was used to assess the possible time trend in the low birth weight rates for considering all regions together and each region separately, according to each variable, and the Poisson regression was calculated in order to demonstrate time trends in low birth weight and the impact of variables (age and educational maternal level, antenatal visits, type of delivery, and gestational age) during the period. All variables were analyzed together using the Poisson regression as well. From the total of 11,200,255 live births used in this study, there was a significant reduction in the number of live births, especially in the more developed regions. The low birth weight rate was 8 %, and it was stable during the period. Considering regional trends, the rate was higher in the Southeast and South regions, and significantly higher in the North, Northeast, and Central West regions. Improvements in maternal education and antenatal care coverage reduced the risk for low birth weight in all regions. Also, there was an increase in caesarean sections in all regions, with a small impact on low birth weight rates. Improvements in education and health care reduced the risk for low birth weight in all Brazilian regions during the period of study. Trends in low birth weight rates and the associated factors differ from region to region, showing different stages of demographic, epidemiological and developmental transition in Brazil. The present study was approved by the Research Ethics Committee at the Hospital de Clínicas de Porto Alegre (Protocol 120323).