Table 1.
Participant characteristics.
| Demographics | Total (n = 54) | Normal Weight (n = 36) | Overweight/Obese (h = 18) |
|---|---|---|---|
| Age, years, M (SD) | 26.4 (7.1) | 24.9 (6.9) | 29.3 (6.9) |
| Sex, n | |||
| Female | 32 | 20 | 11 |
| Male | 22 | 15 | 7 |
| Ethnicity, n (%) | |||
| Hispanic/Latino | 5 (9) | 4(11) | 1 (5.6) |
| Non-Hispanic/Latino | 49 (91) | 32 (89) | 17 (94) |
| Race, n (%) | |||
| Asian | 16 (29) | 13 (36) | 3 (16) |
| Black/African American | 4 (7) | 2 (5.6) | 2 (11) |
| White | 29 (55) | 17 (50) | 11 (61) |
| More than one race | 5 (9) | 2 (11) | 2 (11) |
| Employment, n (%) | |||
| Full time | 14 (27.3) | 6 (19) | 7 (38) |
| Part time | 11 (20.0) | 7 (19) | 4 (22) |
| Unemployed | 3 (5.5) | 1 (3) | 2 (11) |
| Student | 26 (47.3) | 21 (58) | 5 (27.8) |
| Metabolic risk factors, M (SD) | |||
| Glucose, mg/dL | 88.8 (7.2) | 87.4 (6.4) | 91.5 (8.1) |
| Insulin, uU/mL | 14.8 (9.3) | 14.5 (10.6) | 15.6 (6.4) |
| HOMA-IR | 3.3 (2.1) | 3.1 (2.3) | 3.5 (1.5) |
| Body mass index, kg/m2 | 24.3 (4.5) | 21.8 (2.1) | 29.3 (3.5) |
| Body fat, % | 30.4 (9.0) | 27.7 (7.7) | 35.7 (9.3) |
| Sleep, M (SD) | |||
| Sleep onset time, h | 0106 (0128) | 0134 (0125) | 0013 (0111) |
| Sleep offset time, h | 0819 (0113) | 0838 (0107) | 0742 (0109) |
| Sleep duration, min | 436.2 (55.1) | 432.0 (59.3) | 444.6 (45.8) |
| DLMO, h | 2250 (0131) | 2318 (0130) | 2203 (0119) |
| DLMO-sleep onset, h | 0218 (0053) | 0220 (0034) | 0212 (0046) |
DLMO = dim light melatonin onset; HOMA-IR = Homeostatic Model of Assessment–Insulin Resistance.