Influencing factors for late-preterm birth of twins / 中华围产医学杂志

ABSTRACT

Objective To investigate the influencing factors for late-preterm birth of twins. Methods We retrospectively analyzed the clinical data of 301 twins delivered in Beijing Haidian Maternity and Child Health Hospital between August 1, 2011 and August 31, 2013. Twins with late-preterm births were classified as the observation group(n=138) and those delivered at term were classified as the control group (n=163). Comparison between the two groups was conducted on both maternal and neonatal complications. Two independent sample Student's t test, Chi-square test and logistic regression analysis were performed for statistical analysis. Results (1) The ratio of two male fetuses, dichorionic diamniotic twins, and iatrogenic preterm birth were 41.3% (57/138), 76.1% (105/138) and 65.2% (90/138), respectively, in the observation group, while 23.9% (39/163), 89.6% (146/163) and 96.9% (158/163), respectively, in the control group (χ2=10.40, 9.81 and 53.59, respectively, all P0.05). (2) The risk factors for late-preterm birth of twins included hypertension diseases complicated pregnancy, gestational diabetes mellitus, premature rupture of membranes, fetal distress, anemia and umbilical cord abnormality [OR=0.190(95%CI 0.094-0.387), 1.980 (95%CI 1.009-3.883), 0.030(95%CI 0.007-0.131), 0.062(95%CI 0.006-0.642), 0.470(95%CI0.243-0.908) and 2.779(95%CI1.093-20.736), respectively, all P0.05). Conclusions Late-premature births in twin pregnancies are related to many maternal and fetal risk factors. Therefore, clear understanding of these risk factors might improve the pregnancy outcomes.