Applicability of the Institute of Medicine recommendations of gestational weight gain in women with twin pregnancies in Chengdu city / 中华健康管理学杂志

ABSTRACT

Objective:To analyze the applicability of the Institute of Medicine (IOM) recommendations of gestational weight gain (GWG) in women with twin pregnancies in Chengdu city.Methods:A total of 1 862 women delivering live twins ≥28 weeks of gestation at all midwifery institutions in Chengdu city from January 2013 to December 2019 were selected, and the women were divided into low GWG group (880 women), adequate GWG group (839 women) and excessive GWG group (143 women) according to the IOM recommendations of GWG. Information of the subjects was extracted from Chengdu “One-Card” Maternal and Child Health Information System. Chi-square test and analysis of variance were used to compare the basic information, pregnancy complications and perinatal adverse outcomes among the three groups. Multivariate logistic regression was used to analyze the relationship between GWG and pregnancy complications or perinatal adverse outcomes.Results:Of the women, 72.8% (611/1 862) had normal weight before pregnancy. The weight gain of low, adequate and excessive GWG groups was (11.8±3.4) kg, (18.8±2.6) kg and (26.1±2.9) kg, respectively. The incidence of low birthweight was highest in the low GWG group (71.0%), it was lowest in the excessive GWG group (51.0%), and it was 61.3% in the adequate GWG group ( P<0.001). There was no significant difference in gestational hypertension, gestational diabetes mellitus, premature rupture of membranes, very low birthweight, preterm birth, very premature birth, 5-minute Apgar score<7 and neonatal death within 7 days postpartum among the three groups (all P>0.05). The multivariable logistic regression analysis showed that, compared with women inadequate GWG group, those from the low GWG group tended to deliver infants with low birthweight ( OR=1.62, 95% CI 1.32-2.00), whereas women from the excessive GWG group were less likely to deliver low birthweight infants ( OR=0.63, 95% CI 0.44-0.91) (both P<0.05). Conclusion:The IOM recommendations for gestational weight gain are valuable in improving the pregnancy complications and perinatal outcomes of twin pregnancies in Chengdu city to certain extent, especially in improving the low birthweight of newborns.