Saudi Med J 2022 Jun;43(6):599-609
From the Department of Neonatology (Zhang, Zhu Y, Zhu L, Chen, Yuan), Children's Hospital of Fudan University, from the Division of Neonatology (Lu), Gynecology and Obstetrics Hospital of Fudan University; and from the Key Laboratory of Neonatal Diseases (Chen), National Health Commission, Shanghai, China.
Objectives: To investigate the prevalence of preterm birth (PTB) and the risk factors for different gestational age subgroups of preterm birth in China.
Methods: We carried out a descriptive cross-sectional study encompassing all singleton live births (24 to 41 weeks) with completed data in 23 provinces in China from 2010 to 2017 during investigation period. We compared both the preterm group (24 to 36 weeks) and preterm subgroups (<32 weeks, 32 to 33 weeks, and 34 t0 36 weeks) with the term group (37 to 41 weeks). Read More