PMID- 30975675 OWN - NLM STAT- MEDLINE DCOM- 20200420 LR - 20200420 IS - 2044-6055 (Electronic) IS - 2044-6055 (Linking) VI - 9 IP - 4 DP - 2019 Apr 11 TI - Differentiating the cognitive development of early-term births in infants and toddlers: a cross-sectional study in China. PG - e025275 LID - 10.1136/bmjopen-2018-025275 [doi] LID - e025275 AB - OBJECTIVES: This study aimed to explore the cognitive development of low-risk children during early childhood for early-term births at 37 and 38 weeks of gestation compared with full term births at 39-41 weeks of gestation. SETTING AND PARTICIPANTS: We conducted a cross-sectional study in Shanghai, one of the largest cities in China. A total of 1444 children from singleton pregnancies born at term gestation were included in the study. MEASURES: The cognitive outcomes of the subjects were measured using the cognitive subtest of Bayley Scales of Infant and Toddler Development, Third Edition (BSID-III) across three cities in China. We analysed the association between gestational age and cognitive development during infancy and toddler stages using multivariate linear modelling. RESULTS: The cognitive development scores for infants born at 37 gestational weeks were significantly lower than those born at 39-41 gestational weeks (beta=-2.257, 95% CI -4.280 to -0.235; p<0.05) after adjusting for children's and maternal characteristics, as well as socio-economic factors. However, there were no significant differences in cognitive ability between infants born at 38 gestational weeks compared with their full-term counterparts (p>0.05). Moreover, these effects were not found in toddlers (between 17 and 48 months of age) after adjusting for the possible confounders (p>0.05). CONCLUSIONS: Infants born at 37 weeks of gestation exhibited weaker cognitive ability compared with those born at 39-41 weeks of gestation. Our findings provide evidences for the close monitoring of potential developmental problems in early-term children, especially those born at 37 gestational weeks. CI - (c) Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. FAU - Hua, Jing AU - Hua J AD - The Women and Children's Health Care Department, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China. FAU - Sun, Jie AU - Sun J AD - The Women and Children's Health Care Department, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China. FAU - Cao, Zhijuan AU - Cao Z AD - The Women and Children's Health Care Department, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China. FAU - Dai, Xiaotian AU - Dai X AD - The Women and Children's Health Care Department, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China. FAU - Lin, Senran AU - Lin S AD - The Women and Children's Health Care Department, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China. FAU - Guo, Jialin AU - Guo J AD - The Women and Children's Health Care Department, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China. FAU - Gu, Guixiong AU - Gu G AD - Health Statistical Division, Pediatrics Research Institution of Soochow University, Suzhou, China. FAU - Du, Wenchong AU - Du W AD - Psychology Division, Nottingham Trent University, Nottingham, UK. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190411 PL - England TA - BMJ Open JT - BMJ open JID - 101552874 SB - IM MH - Child Development/*physiology MH - Child, Preschool MH - China/epidemiology MH - Cognition/*physiology MH - Cross-Sectional Studies MH - Female MH - Gestational Age MH - Humans MH - Infant MH - *Infant, Premature MH - Male MH - Neurodevelopmental Disorders/*epidemiology PMC - PMC6500364 OTO - NOTNLM OT - China OT - cognitive development OT - early term OT - infants and toddlers COIS- Competing interests: None declared. EDAT- 2019/04/13 06:00 MHDA- 2020/04/21 06:00 PMCR- 2019/04/11 CRDT- 2019/04/13 06:00 PHST- 2019/04/13 06:00 [entrez] PHST- 2019/04/13 06:00 [pubmed] PHST- 2020/04/21 06:00 [medline] PHST- 2019/04/11 00:00 [pmc-release] AID - bmjopen-2018-025275 [pii] AID - 10.1136/bmjopen-2018-025275 [doi] PST - epublish SO - BMJ Open. 2019 Apr 11;9(4):e025275. doi: 10.1136/bmjopen-2018-025275.