Table 1 Baseline characteristics of survey participants
| Â | Total | Male | Female | p |
|---|---|---|---|---|
N | 3097 | 2070 | 1027 | Â |
Age (yr), mean (SD) | 18.18 (.85) | 18.22 (.89) | 18.10 (.76) | 0.000 |
Ethnicity, n (%) | ||||
 Han | 2891 (90.43) | 1953 (90.79) | 938 (89.67) | 0.313 |
 Minority | 306 (9.57) | 198 (9.21) | 108 (10.33) | |
Body mass index, mean (SD) | ||||
 BMI (kg/m2) | 21.21 (3.80) | 21.82 (4.07) | 19.98 (2.80) | 0.000 |
Smoking, n (%) | ||||
 Current smoker | 24 (0.78) | 21 (1.01) | 3 (0.30) | 0.038 |
 Current nonsmoker | 3056 (99.22) | 2065 (98.99) | 991 (99.70) | |
Drinking n (%) | ||||
 Current drinker | 88 (2.86) | 73 (3.50) | 15 (1.51) | 0.002 |
 Current nondrinker | 2992 (97.14) | 2013 (96.50) | 979 (98.49) | |
Self-rated physical health, mean (SD) | ||||
 Physical health score (1–10) | 5.78 (1.83) | 5.77 (1.86) | 5.80 (1.75) | 0.687 |
Self-rated mental health, mean (SD) | ||||
 Mental health score (1–10) | 7.07 (1.89) | 7.09 (1.92) | 7.02 (1.81) | 0.339 |
Leisure-time vigorous physical activity, mean (SD) | ||||
 Total minutes of vigorous physical activity in last week | 96.01 (112.52) | 107.35 (115.65) | 72.83 (102.04) | 0.000 |
Leisure-time moderate physical activity, mean (SD) | ||||
 Total minutes of moderate physical activity in last week | 212.12 (173.76) | 219.63 (174.92) | 197.52 (170.63) | 0.001 |
Leisure-time MVPA, mean (SD) | ||||
 Total minutes of vigorous and moderate physical activity in last week | 306.53 (228.99) | 325.77 (231.13) | 268.33 (219.89) | 0.000 |
Walking, mean (SD) | ||||
 Total minutes of walking in last week | 71.61 (115.84) | 71.49 (110.14) | 71.85 (126.42) | 0.939 |
Sedentary behavior, mean (SD) | ||||
 Total hours of sedentary behavior per day | 8.96 (2.78) | 8.87 (2.80) | 9.12 (2.75) | 0.019 |
Sleeping behavior, mean (SD) | ||||
 Total hours of sleeping behavior per day | 7.68 (0.85) | 7.69 (0.84) | 7.65 (0.87) | 0.228 |
Total MTEs in last week, mean (SD) | 1732.45 (1372.42) | 1843.00 (1371.02) | 1510.93 (1348.88) | 0.000 |