Reid KJ, Facco FL, Grobman WA, Parker CB, Herbas M, Hunter S, Silver RM, Basner RC, Saade GR, Pien GW, Manchanda S, Louis JM, Nhan-Chang CL, Chung JH, Wing DA, Simhan HN, Haas DM, Iams J, Parry S, Zee PC. Sleep during pregnancy: the nuMoM2b pregnancy and sleep duration and continuity study. Sleep. 2017 May 1.

STUDY OBJECTIVES: To characterize sleep duration, timing and continuity measures in pregnancy and their association with key demographic variables.

METHODS: Multi-site prospective cohort study. Women enrolled in the nuMoM2b study (nulliparous women with a singleton gestation) were recruited at the second study visit (16- 21 weeks of gestation) to participate in the Sleep Duration and Continuity Substudy. Women <18 years of age, or with pregestational diabetes or chronic hypertension were excluded from participation. Women wore a wrist activity monitor and completed a sleep log for 7 consecutive days. Time in bed, sleep duration, fragmentation index, sleep efficiency, wake after sleep onset, and sleep midpoint were averaged across valid primary sleep periods for each participant.

RESULTS: Valid data were available from 782 women, mean age of 27.3 (5.5) years. Median sleep duration was 7.4 hours. Approximately 27.9% of women had asleep duration of < 7 hours; 2.6% had a sleep duration of > 9 hours. In multivariable models including age, race/ethnicity, body mass index, insurance status and recent smoking history, sleep duration was significantly associated with race/ethnicity and insurance status, while time in bed was only associated with insurance status. Sleep continuity measures and sleep midpoint were significantly associated with all covariates in the model, with the exception of age for fragmentation index, and smoking for wake after sleep onset.

CONCLUSIONS: Our results demonstrate the relationship between sleep and important demographic characteristics during pregnancy.

Share on: