Table 2.

Sleep, circadian measures, and transdiagnostic symptoms from 33 weeks of gestation to 16 weeks postpartum.

Measure	33 Weeks		2 Weeks		6 Weeks		16 Weeks
	Early	Late	Early	Late	Early	Late	Early	Late
Sleep and circadian measures
Sleep onset (clock time ± minutes)	10:38 p.m. ± 35	12:33 a.m. ± 46*	11:07 p.m. ± 56	12:10 a.m. ± 65*	11:11 p.m. ± 62	12:17 p.m. ± 62*	10:58 p.m. ± 53	12:13 a.m. ± 69*
Sleep offset (clock time ± min)	7:31 a.m. ± 64	8:29 a.m. ± 78*	7:43 a.m. ± 59	9:03 a.m. ± 82*	7:49 a.m. ± 64	8:52 a.m. ± 73*	7:04 a.m. ± 55	8:00 a.m. ± 79*
Time in bed (min)	524 ± 41	477 ± 68*	517 ± 54	534 ± 65	507 ± 74	516 ± 56	488 ± 56	468 ± 75
Estimated sleep duration (min)	439 ± 73	385 ± 71*	369 ± 62	372 ± 52	384 ± 57	375 ± 57	406 ± 53	379 ± 66
Sleep efficiency (%)	84.5 ± 11.0%	82.0 ± 7.6%	73.0 ± 7.1%	71.3 ± 7.1%	77.6 ± 6.9%	74.1 ± 7.5%	84.4 ± 6.3%	81.9 ± 7.6%
DLMO (clock time ± min)	9:05 p.m. ± 74	9:46 p.m. ± 88			9:31 p.m. ± 80	10:05 p.m. ± 93
Phase angle (h)	1.5 ± 1.0	2.7 ± 1.2*			1.6 ± 1.2	2.0 ± 1.1
Transdiagnostic symptoms
Highs	1.40 ± 1.63	2.19 ± 2.0	0.92 ± 1.32	2.31 ± 2.09*	1.16 ± 1.70	1.88 ± 2.29	1.33 ± 1.95	2.00 ± 1.84
OCI	14.28 ± 19.75	18.37 ± 21.01			14.00 ± 21.98	18.04 ± 23.45
HAM-D17	5.88 ± 3.11	6.69 ± 3.58	6.08 ± 3.00	9.35 ± 5.61*	6.96 ± 3.98	9.04 ± 5.15	6.79 ± 4.18	9.21 ± 8.26

Sleep measures were collected by actigraphy during each study week, and circadian measures were determined using salivary dim light melatonin onset measured at week 33 of pregnancy and week 6 postpartum. Hypomanic/manic symptoms were measured with the Highs scale. Obsessive-compulsive symptoms were measured with the Obsessive-Compulsive Inventory (OCI). Depressive symptoms were measured with the 17-item Hamilton Rating Scale for Depression (HAM-D17)

*p < 0.05, showing when the “late sleep” group was significantly different compared with the “early sleep” group