1. Association of labour duration in spontaneous deliveries with low neonatal Apgar scores and foetal acidosis: the Japan Environment and Children's Study.
- Author
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Murata T, Yasuda S, Imaizumi K, Isogami H, Fukuda T, Kyozuka H, Yamaguchi A, Sato A, Ogata Y, Shinoki K, Hosoya M, Yasumura S, Hashimoto K, Nishigori H, and Fujimori K
- Subjects
- Pregnancy, Infant, Newborn, Female, Child, Humans, Apgar Score, Japan epidemiology, Delivery, Obstetric, Umbilical Arteries, Retrospective Studies, Acidosis epidemiology, Fetal Diseases
- Abstract
This study evaluated the association between labour duration (LD) and incidence of low neonatal Apgar scores and foetal acidosis. Data of 37,682 women with full-term singleton spontaneous vaginal deliveries from the Japan Environment and Children's Study were analysed. Women were classified according to the median LD as nulliparous (< 10 or ≥ 10 h) or multiparous (< 5 or ≥ 5 h) and further into five subcategories: nulliparous (< 10.0, 10.0-12.9, 13.0-15.9, 16.0-18.9, and ≥ 19 h) and multiparous (< 5.0, 5.0-7.9, 8.0-10.9, 11.0-13.9, and ≥ 14.0 h). Multiple logistic regression models were used to determine odds ratios (ORs) for outcomes in women with over-median LD. Over-median LD exhibited no statistically significant association with low neonatal Apgar scores. The adjusted ORs for both umbilical artery (UmA-pH) < 7.2 and < 7.1 were increased in nulliparous women with over-median LD, whereas only the adjusted OR for UmA-pH < 7.2 was increased in multiparous women with over-median LD. Moreover, this association manifested as a plateau in nulliparous women with LD ≥ 13 h and without dose-dependent association in multiparous women., (© 2022. The Author(s).)
- Published
- 2022
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