Table 1.
Characteristics of the analytic sample at baseline.*
| Total (n = 65) | Male (n = 18) | Female (n = 47) | |
|---|---|---|---|
| Demographic and Health | |||
| Age (y) | 35.2 ± 13.0 | 32.4 ± 11.6 | 36.2 ± 13.5 |
| BMI (kg/m2) | 26.1 ± 3.6 | 26.8 ± 3.4 | 25.8 ± 3.6 |
| Race/ethnicity | |||
| Non-Hispanic White | 22 (34) | 6 (33) | 16 (34) |
| Non-White or Hispanic | 43 (66) | 12 (67) | 31 (66) |
| Education | |||
| ≥ College degree | 54 (83) | 13 (72) | 41 (87) |
| < College degree | 11 (17) | 5 (28) | 6 (13) |
| Sleep Behaviors | |||
| Sleep duration (min) | 457 ± 23 | 459 ± 26 | 441 ± 21 |
| Sleep efficiency (%) | 91.4 ± 2.9 | 90.6 ± 2.9 | 91.7 ± 2.9 |
| Midpoint of sleep (hh:mm) | 03:50 ± 01:02 | 04:14 ± 00:51a | 03:42 ± 01:02b |
| Bedtime (hh:mm) | 23:17 ± 02:57 | 22:52 ± 05:25 | 23:26 ± 01:03 |
| Eating Patterns | |||
| Eating frequency (#) | 4.5 ± 1.4 | 3.9 ± 1.2 | 4.7 ± 1.4 |
| Eating window (h) | 10.8 ± 1.8 | 10.9 ± 1.8 | 10.8 ± 1.9 |
| Eating midpoint (hh:mm) | 14:33 ± 01:04 | 15:02 ± 0:43a | 14:22 ± 01:08b |
| SD eating frequency (#) | 0.8 ± 0.5 | 0.7 ± 0.4 | 0.8 ± 0.5 |
| SD eating window (h) | 1.8 ± 1.2 | 1.7 ± 0.8 | 1.9 ± 1.3 |
| SD eating midpoint (hh:mm) | 0:48 ± 0:26 | 0:41 ± 0:19 | 0:51 ± 0:29 |
Values are presented as mean ± SD or n (%). *Row values with different letters differ significantly (P < .05) based on results of an independent samples t-test. BMI = body mass index, SD = standard deviation.