Association between interpregnancy interval and adverse perinatal outcomes according to maternal age in the context of China’s two-child policy by SiQin Xiu, Li Tang, Chengjie Qin, Di Tian, Yuhong Chen, Lingling Gu, Liu Yang, Yuhao Sun, Xinghui Liu, Yonghong Lin, Yumei Wang

“…Logistic regression modeling, incorporating restricted cubic spline (RCS), was used to assess association between IPI and adverse perinatal outcomes, including full-term low birthweight (LBW), preterm birth (PTB), small-for-gestational age (SGA) and adverse neonatal composite (very low birthweight, very preterm birth, severe neonatal asphyxia or death). Results Women with longer IPIs (≥ 120 months) were more likely to be older (≥ 35 years) and had higher rates of gestational diabetes and hypertensive disorders of pregnancy (p < 0.05). …”
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