Study on the relationship between frequencies of prenatal care and neonatal low birth weight in women of childbearing age from rural areas of Shaanxi province / 中华流行病学杂志

ABSTRACT

Objective To investigate the relationship between frequencies of prenatal care and neonatal low birth weight (LBW) among women of childbearing age from the rural areas of Shaanxi province.Methods A questionnaire survey was conducted among the childbearing-aged women from the rural areas.Samples were selected through multi stage stratified random sampling method.The childbearing aged women were in pregnancy or having had definite outcomes of pregnancy.Measurement of data was described by median ± standard deviation,and chi square test was used to compare the rates.Neonatal low birth weight and frequencies of prenatal care were dependent variables and independent variables grouped into the generalized Poisson regression model.Confounding factors were under control.Results The overall incidence rate of LBW was 3.75％ among 18 911 rural women of childbearing age during 2010-2013.Frequencies on pregnancy care were up to 15 times (0.70％),with a minimum of 0 (0.70％),an average of 5.65± 2.74 times (including ≥ 10 times accounted for 12.37％;≥7 times accounted for 28.52％;≥5 times accounted for 62.80％ and ＜4 times accounted for 21.49％).After controlling confounding factors,results from the generalized Poisson regression analysis revealed that the difference was statistically significant when compared to the reference group.The incidence of neonatal LBW in the ＜4 group was 1.61 times of the one in the ＞7 group (OR=1.61,95％CI1.31-2.00) while in the ＜4 group it was 1.23 times of the 4-7 group (OR=1.23,95％ CI1.04-1.45).Conclusion In the rural areas of Shaanxi province,the incidence of neonatal LBW was gradually reduced through the increasing number of frequencies on prenatal care,among women of childbearing age.