OBJECTIVE: To examine whether time of delivery influences the risk of neonatal morbidity among women with singleton pregnancies. STUDY DESIGN: Secondary analysis of data from the Maternal Fetal Medicine Units Network Factor V Leiden Mutation study. We categorized time of delivery as day (07:00-16:59), evening (17:00-23:59), and overnight (midnight-06:59). Severe neonatal morbidity was defined by at least one of the following: respiratory distress syndrome, transient tachypnea of the newborn, sepsis, seizures, neonatal intensive care admission, or a 5-minute APGAR ≤3. We calculated frequencies of severe neonatal morbidity by time of delivery. Multivariate analysis was performed to determine whether time of delivery was independently associated with severe neonatal morbidity. RESULTS: Among 4,087 women, 1,917 (46.9%) delivered during the day, 1,140 (27.9%) delivered in the evening, and 1,030 (25.2%) delivered overnight. We observed no significant differences in the rates of neonatal morbidity between delivery time periods (day: 12.3%; evening: 12.8%; overnight: 12.6%; p = 0.9). No significant association was observed between time of delivery and neonatal morbidity after adjustment for maternal, obstetric, and peripartum factors. CONCLUSION: Our findings suggest that time of delivery is not associated with severe neonatal morbidity. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.
OBJECTIVE: To examine whether time of delivery influences the risk of neonatal morbidity among women with singleton pregnancies. STUDY DESIGN: Secondary analysis of data from the Maternal Fetal Medicine Units Network Factor V Leiden Mutation study. We categorized time of delivery as day (07:00-16:59), evening (17:00-23:59), and overnight (midnight-06:59). Severe neonatal morbidity was defined by at least one of the following: respiratory distress syndrome, transient tachypnea of the newborn, sepsis, seizures, neonatal intensive care admission, or a 5-minute APGAR ≤3. We calculated frequencies of severe neonatal morbidity by time of delivery. Multivariate analysis was performed to determine whether time of delivery was independently associated with severe neonatal morbidity. RESULTS: Among 4,087 women, 1,917 (46.9%) delivered during the day, 1,140 (27.9%) delivered in the evening, and 1,030 (25.2%) delivered overnight. We observed no significant differences in the rates of neonatal morbidity between delivery time periods (day: 12.3%; evening: 12.8%; overnight: 12.6%; p = 0.9). No significant association was observed between time of delivery and neonatal morbidity after adjustment for maternal, obstetric, and peripartum factors. CONCLUSION: Our findings suggest that time of delivery is not associated with severe neonatal morbidity. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.
Authors: Aaron B Caughey; Adam C Urato; Kathryn A Lee; Mari-Paule Thiet; A Eugene Washington; Russell K Laros Journal: Am J Obstet Gynecol Date: 2008-05-23 Impact factor: 8.661
Authors: Edward F Bell; Nellie I Hansen; Frank H Morriss; Barbara J Stoll; Namasivayam Ambalavanan; Jeffrey B Gould; Abbot R Laptook; Michele C Walsh; Waldemar A Carlo; Seetha Shankaran; Abhik Das; Rosemary D Higgins Journal: Pediatrics Date: 2010-07-19 Impact factor: 7.124