. Author manuscript; available in PMC: 2018 Oct 1.

Published in final edited form as: Am J Obstet Gynecol. 2017 Jun 7;217(4):447.e1–447.e13. doi: 10.1016/j.ajog.2017.05.066

Table 3.

Association of sleep duration, continuity and timing with hypertensive disease of pregnancy and gestational diabetes

	Hypertensive disease of pregnancy		Gestational Diabetes

Sleep characteristic	N(%)	Crude OR	N(%)	Crude OR

Sleep Duration
<7 hours	27/218 (12.4)	1.10 (0.68, 1.78)	15/218 (6.9)	2.24 (1.11, 4.53)
≥7 hours	64/564 (11.3)	1.00	18/564 (3.2)	1.00
		p-value = 0.6850		p-value = 0.0246
Sleep Midpoint
>5 AM	17/148 (11.5)	0.98 (0.56, 1.72)	12/148 (8.1)	2.58 (1.24, 5.36)
≤5 AM	74/634 (11.7)	1.00	21/634 (3.3)	1.00
		p-value = 0.9497		p-value = 0.0114
WASO
≥75^th percentile^a	27/196 (13.8)	1.30 (0.80, 2.11)	10/196 (5.1)	1.32 (0.62, 2.82)
<75^th percentile	64/586 (10.9)	1.00	23/586 (3.9)	1.00
		p-value = 0.2816		p-value = 0.4789
Sleep Fragmentation Index
≥75^th percentile^a	25/196 (12.8)	1.15 (0.70, 1.88)	10/196 (5.1)	1.32 (0.62, 2.82)
<75^th percentile	66/586 (11.3)	1.00	23/586 (3.9)	1.00
		p-value = 0.5730		p-value = 0.4789

A cutoff of 56.0 minutes for WASO is the upper 25^th percentile. A cutoff of 21.4% for sleep fragmentation is the upper 25^th percentile.