Table 2.

Participant and Self-reported Sleep Characteristics Collected During Screening, Actigraphy-Derived Sleep in the 14-day Baseline Prior to a Laboratory Visit, and Polysomnography Sleep on Night 1 of the Laboratory Visits

Characteristics	Final sample (N = 19)
Age, mean (SD), y	28.7 (10.4)
Sex, No. (%)
Male	12 (63)
Female	7 (37)
Body mass index, mean (SD), kg/m2	24.8 (3.9)
Weekly alcohol consumption, No. (SD)	0.3 (0.5)
Daily caffeine consumption, No. (SD)	0.9 (0.9)
Self-reported habitual bedtime, mean (SD), min	22:51 (01:09)
Self-reported habitual wake up time, mean (SD), min	07:29 (00:56)
Self-reported habitual total sleep time, mean (SD) hrs	7.7 (0.9)
Morningness-Eveningness Questionnaire, mean (SD)	15.2 (2.4)
Insomnia Severity Index, mean (SD)	4.0 (3.9)
Pittsburgh Sleep Quality Index, mean (SD)	4.1 (2.7)
Epworth Sleepiness Scale, mean (SD)	3.8 (3.2)

Actigraphy-derived Sleep during 14-day baseline	Control lighting	Circadian-informed lighting
Total sleep time, mean (SD), hrs	6.8 (1.1)	6.7 (0.9)
Sleep onset latency, mean (SD), min	19.6 (13.0)	20.6 (13.5)
Wake after sleep onset, mean (SD), min	39.1 (19.1)	37.9 (16.5)
Sleep efficiency, mean (SD), min	84.4 (4.7)	84.2 (4.4)

Polysomnography-derived sleep on night 1 of the laboratory visit	Control lighting	Circadian-informed lighting
Total sleep time, mean (SD), hrs	8.6 (0.4)	8.6 (0.4)
Sleep onset latency, mean (SD), min	40.8 (28.6)	31.6 (21.9)
Wake after sleep onset, mean (SD), min	58.9 (38.5)	70.2 (60.0)
Sleep efficiency, mean (SD), min	82.3 (7.5)	81.8 (11.0)
N1 sleep duration, mean (SD), min	31.5 (11.8)	30.9 (12.6)
N2 sleep duration, mean (SD), min	232.0 (32.2)	215.9 (39.2)
N3 sleep duration, mean (SD), min	113.5 (31.5)	119.5 (34.4)
REM sleep duration, mean (SD), min	86.7 (32.8)	93.1 (34.5)

N1, non-REM sleep stage 1; N2, Non-REM sleep stage 2; N3, Non-REM sleep stage 3; REM, rapid eye movement; SD, standard deviation.