Table 1 Demographic and phenotype statistics of the entire study sample

Age, years

17.3 (2.1)

13–23

Male, %

55.9

Non-hispanic white, %

23.2

BMI, percentile %

64.5 (29.0)

0.7—99.8

Bedtime

Self-report, hh:mm

23:40 (1:30)

20:17 – 28:30

Actigraphy, hh:mm

23:59 (1:20)

20:20 – 27:30

Polysomnography, hh:mm

22:00 (0:12)

21:00 – 23:06

Sleep latency

Self-report, minutes

24.1 (19.6)

5—140

Actigraphy, minutes

7.5 (8.5)

1—54

Polysomnography, minutes

25.7 (21.45)

2—131

Sleep onset

Self-report, hh:mm

24:06 (1:35)

20:32 – 30.28

Actigraphy, hh:mm

24:07 (1:19)

20:27 – 27:22

Polysomnography, hh:mm

22:26 (0:26)

21:04 – 24:14