Table 1.

Perinatal Sleep, Circadian Rhythms, and Weight in PPWR+ and PPWR− groups

	33 Weeks	2 Weeks	6 Weeks	16 Weeks	Effect of Week/Group
Measure
Sleep Onset  PPWR+	00:18±61min	00:22±61min	00:03±74min	00:02±86min	Week: F(3,17)=0.64, p=.59 Group: F(1,19)=3.93, p=.06
PPWR−	23:25±89min	23:14±58min	23:37±74min	23:01±73min
Full Sample	23:45±82min	23:40±67min	23:47±73min	23:25±82min
Sleep Offset  PPWR+	09:01±91min	09:40±104min	08:52±103min	08:19±105min	Week: F(3,17)=7.80 p<.001 Group: F(1,19)=7.97, p=.011
PPWR−	07:20±54min	08:01±74min	08:02±63min	06:52±59min
Full Sample	07:59±85min	08:39±97min	08:21±82min	07:25±88min
Sleep Period Time  PPWR+	525±90min	557±83min	528±51min	498±74min	Week: F(3,17)=3.34, p=.025 Group: F(1,19)=2.78, p=.11
PPWR−	475±51min	528±65min	492±75min	457±110min
Full Sample	494±71min	539±72min	506±68min	473±98min
TST  PPWR+	379±112min	350±94min	372±37min	396±67min	Week: F(3,17)=1.21, p=.31 Group: F(1,19)=0.03, p=.87
PPWR−	405±51min	371±38min	363±54min	375±110min
Full Sample	395±78min	363±64min	366±47min	383±95min
Sleep Efficiency  PPWR+	74.0±14.1%	65.9±4.7%	72.3±5.4%	80.2±5.1%	Week: F(3,17)=21.77, p<.001 Group: F(1,19)=7.79, p=.012
PPWR−	85.8±4.4%	72.0±7.2%	75.5±7.7%	85.3±6.8%
Full Sample	81.3±10.8%	69.7±7.0%	74.3±7.0%	83.4±6.6%
DLMO  PPWR+ (n=7)	22:17±81min		22:13±120min		33 Weeks: t=−1.77, df=17, p=.09 6 Weeks: t=−.566, df=14, p=.58
PPWR− (n=12)	21:17±66min		21:44±86min
Full Sample	21:39±76min		21:56±100min
Weight  PPWR+	76.3±15.5 kg	90.1±16.5 kg		90.0±17.5 kg	Week: F(2,18)=16.68 p<.001 Group: F(1,19)=2.48, p=.13 Time * Group: F(2,18)=18.73, p p<.001
PPWR−	71.8± 21.9 kg	73.5± 17.9 kg		71.8± 19.6 kg
Full Sample	73.5±19.4 kg	79.9±18.9 kg		78.7±20.4 kg
BMI  PPWR+	26.8±5.0kg/m2	31.6±5.2kg/m2		31.5±5.7kg/m2	Week: F(2,18)=15.79 p<.001 Group: F(1,19)=0.35, p=.56 Time * Group: F(2,18)=17.54, p p<.001
PPWR−	27.7±9.6kg/m2	28.3±8.0kg/m2		27.7±8.9kg/m2
Full Sample	27.4±8.0kg/m2	29.6±7.1kg/m2		29.2±7.9kg/m2