Table 1.
Participant Characteristics
| Demographics | Total (n=97) M(SD) or N(%) |
Women (n=61) M(SD) or N(%) |
Men (n=36) M(SD) or N(%) |
|
|---|---|---|---|---|
| Age (years) | 26.8 (7.3) | 26.9 (8.4) | 26.5 (5.7) | |
| Ethnicity | Hispanic/Latino | 8 (8.2) | 4 (6.6) | 4 (11.1) |
| Non- Hispanic/Latino |
89 (91.8) | 57 (93.4) | 32 (88.9) | |
| Race | Asian | 22 (22.7) | 14 (23.0) | 8 (22.2) |
| Black/African American |
6 (6.2) | 5 (8.2) | 1 (2.8) | |
| White | 61 (62.9) | 38 (62.3) | 23 (36.8) | |
| More than one race | 7 (7.2) | 3 (4.9) | 4 (11.1) | |
| Do not wish to respond |
1 (1) | 1 (1.6) | 0 (0) | |
| Employment* | ||||
| Full time | 34 (35.1) | 21 (34.4) | 31 (36.1) | |
| Part time | 15 (15.5) | 11 (18.0) | 4 (11.1) | |
| Unemployed | 6 (6.2) | 4 (6.6) | 1 (2.8) | |
| Student | 42 (43.3) | 25 (41.0) | 17 (47.2) | |
|
Weight and Body Fat |
||||
| BMI (kg/m2) | 24.0 (4.6) | 23.9 (5.0) | 24.7 (3.8) | |
| Body Fat% | 30.4 (8.4) | 34.8 (6.6) | 22.9 (5.6) | |
| Sleep | ||||
| PSQI Global Score |
3.5 (2.0) | 3.6 (2.2) | 3.3 (1.6) | |
| Sleep Onset (hh:mm) |
00:47 (1:22) | 00:39 (1:22) | 01:02 (1:22) | |
| Sleep Offset (hh:mm) |
08:05 (1:14) | 08:06 (1:16) | 08:04 (1:12) | |
| Sleep midpoint (hh:mm) |
04:42 (1.24) | 04:37 (1:17) | 04:48 (1:10) | |
| Sleep Duration (min) |
443.7 (50.4) | 452.1 (48.1) | 429.5 (52.9) | |
| DLMO (hh:mm) | 22:36 (1:27) | 22:24 (1:18) | 22:57 (1:40) | |
| Circadian alignment (Phase angle of DLMO to sleep onset, hh:mm) |
2:11 (0:57) | 2:14 (0:59) | 2:05 (0:55) | |
| Dietary Intakea | ||||
| Caloric intake (kcal) |
2079 (656) | 1905 (594) | 2308 (673) | |
| Protein | 87.78 (44.87) | 76.72 (47.00) | 105.60 (34.97) | |
| Fat | 79.17 (33.09) | 71.45 (28.80) | 91.62 (36.09) | |
| Carbohydrates | 243.21 (81.04) | 229.98 (76.60) | 264.53 (84.48) | |
| Number of meals | 4.39 (1.22) | 4.46 (1.18) | 4.28 (1.28) | |
| Physical activityb | ||||
| Physical activity duration above 3.0 mets (hh:mm per day) |
1:49 (0:58) | 1:29 (0:49) | 2:26 (0:56) | |
Note. PSQI= Pittsburg Sleep Quality Index, DLMO= dim light melatonin onset,
*
79% of participants reported work or school obligations during the 7 days of actigraphy.
Number of participants varies due to missing data for some measures.
a
N=95 for dietary intake,
b
N= 72 for physical activity.