Table 1.

Sleep stage variables on the baseline night. Means (standard deviations) in minutes. P-values report statistical significance assessed using a paired t-test between initial and follow-up assessment for the children and teen cohorts. SWS = slow wave sleep; WASO = wake after sleep onset; Sleep Latency = first 1.5 consecutive minutes of stage 1 or first stage 2 sleep; REM Sleep Latency = sleep onset to first occurrence of REM sleep; Sleep Efficiency = total sleep time divided by time in bed.

Sleep Variable	Children			Teens			Young Adults
	Initial	Follow- Up	P- Value	Initial	Follow- Up	P-Value	Initial
Age (Years)	10.1 (0.57)	12.4 (0.73)	< 0.0001	15.7 (0.46)	18.1 (0.63)	< 0.0001	22.5 (1)
Stage 1 (Min)	34 (13)	35 (14)	0.86	34 (9)	42 (12)	0. 001	53 (19)
Stage 2 (Min)	192 (54)	233 (33)	0.004	225 (35)	262 (33)	0.00002	252 (34)
SWS (Min)	234 (52)	180 (47)	0.0005	157 (34)	112 (34)	0.000001	76 (32)
REM Sleep (Min)	107 (20)	116 (23)	0.08	101 (17)	108 (28)	0.15	99 (15)
WASO (Min)	17 (18)	12 (15)	0.39	10 (12)	9 (7)	0.58	17 (12)
Sleep Latency (Min)	14 (11)	16 (16)	0.61	9 (5)	9 (6)	0.93	10 (9)
REM Sleep Latency (Min)	156 (42)	146 (51)	0.43	153 (50)	133 (44)	0.11	122 (36)
Total Sleep Time (Min)	567 (22)	564 (20)	0.53	516 (14)	524 (27)	0.18	480 (15)
Time in Bed (Min)	603 (10)	600 (<1)	0.16	541 (6)	546 (25)	0.35	511 (4)
Sleep Efficiency (%)	94 (4)	94 (3)	0.95	95 (2)	96 (2)	0.25	94 (3)