Table 1.
Characteristics of participants by sedentary behavior.
| Variable | Category | Total | Sedentary behavior (h/day) | |||
|---|---|---|---|---|---|---|
| <1 | 1–2.9 | 3–6.9 | ≥7 | |||
| Cluster-level variables | ||||||
| Year of enrolment | 2017 | 8,226 (29.1) | 680 (30.0) | 4,044 (30.8) | 3,295 (27.9) | 207 (19.4) |
| 2018 | 20,072 (79.9) | 1,588 (70.0) | 9,088 (69.2) | 8,536 (72.1) | 860 (80.6) | |
| Location of university | Changsha | 13,224 (46.7) | 1,076 (47.4) | 6,345 (48.3) | 5,417 (45.8) | 386 (36.2) |
| Wuhan | 5,588 (19.8) | 426 (18.8) | 2,696 (20.5) | 2,249 (19.0) | 217 (20.3) | |
| Xiamen | 4,196 (14.8) | 272 (12.0) | 1,703 (13.0) | 2,007 (17.0) | 214 (20.1) | |
| Urumchi | 2,912 (10.3) | 320 (14.1) | 1,374 (10.5) | 1,111 (9.4) | 107 (10.0) | |
| Hohhot | 2,378(8.4) | 174 (7.7) | 1,014 (7.7) | 1,047 (8.8) | 143 (13.4) | |
| Individual-level variables | ||||||
| Region of hometown | North | 4,583 (16.2) | 362 (16.0) | 2,084 (15.9) | 1,930 (16.3) | 207 (19.4) |
| Northeast | 1,052 (3.7) | 109 (4.8) | 503 (3.8) | 393 (3.3) | 47 (4.4) | |
| East | 6,197 (21.9) | 498 (22.0) | 2,824 (21.5) | 2,647 (22.4) | 228 (21.4) | |
| Central | 6,420 (22.7) | 445 (19.6) | 2,955 (22.5) | 2,790 (23.6) | 230 (21.6) | |
| South | 2,202 (7.8) | 134 (5.9) | 993 (7.6) | 995 (8.4) | 80 (7.5) | |
| Southwest | 2,868 (10.1) | 198 (8.7) | 1,325 (10.1) | 1,236 (10.5) | 109 (10.2) | |
| West | 4,976 (17.6) | 522 (23.0) | 2,448 (18.6) | 1,840 (15.5) | 166 (15.5) | |
| Age (year) | 18.3 ± 0.8 | 18.4 ± 0.9 | 18.3 ± 0.8 | 18.3 ± 0.8 | 18.3 ± 0.8 | |
| Body mass index (kg/m2) | 21.2 ± 3.5 | 21.3 ± 3.5 | 21.3 ± 3.6 | 21.2 ± 3.5 | 21.3 ± 3.6 | |
| Gender | Male | 15,141 (53.5) | 1,285 (56.7) | 6,982 (46.1) | 6,341 (53.6) | 533 (49.9) |
| Female | 13,157 (46.5) | 983 (43.3) | 6,150 (46.8) | 5,490 (46.4) | 534 (50.1) | |
| Ethnicity | Han | 23,398 (82.7) | 1,765 (77.8) | 10,834 (82.5) | 9,926 (83.9) | 873 (81.8) |
| Other | 4,900 (17.3) | 503 (22.2) | 2,298 (17.5) | 1,905 (16.1) | 194 (18.2) | |
| Annual family income (CNY) | <10,000 | 2,929 (10.3) | 331 (14.6) | 1,326 (10.1) | 1,146 (9.7) | 126 (11.8) |
| 10,001–30,000 | 6,232 (22.0) | 527 (23.2) | 2,860 (21.8) | 2,598 (22.0) | 247 (23.1) | |
| 30,001–50,000 | 4,859 (17.2) | 342 (15.1) | 2,232 (17.0) | 2,095 (17.7) | 190 (17.8) | |
| 50,001–99,999 | 6,331 (22.4) | 457 (20.1) | 2,933 (22.3) | 2,712 (22.9) | 229 (21.5) | |
| 100,000–199,999 | 5,736 (20.3) | 432 (19.1) | 2,737 (20.8) | 2,367 (20.0) | 200 (18.7) | |
| ≥200,000 | 2,211 (7.8) | 179 (7.9) | 1,044 (8.0) | 913 (7.7) | 75 (7.0) | |
| Smoking | No | 27,906 (98.6) | 2,235 (98.5) | 12,966 (98.7) | 11,665 (98.6) | 1,040 (97.5) |
| Yes | 392 (1.4) | 33 (1.5) | 166 (1.3) | 166 (1.4) | 27 (2.5) | |
| Alcohol drinking | No | 26,990 (92.4) | 2,182 (96.2) | 12,615 (96.1) | 11,207 (94.7) | 986 (92.4) |
| Yes | 1,308 (6.2) | 86 (3.8) | 517 (3.9) | 624 (5.3) | 81 (7.6) | |
| Physical activity (min/week) | No | 8,436 (29.8) | 571 (25.2) | 3,286 (25.0) | 4,080 (34.5) | 499 (46.8) |
| 1–59 | 3,367 (11.9) | 329 (14.5) | 1,700 (12.9) | 1,256 (10.6) | 82 (7.7) | |
| 60–179 | 6,584 (23.3) | 572 (25.2) | 3,327 (25.3) | 2,525 (21.3) | 160 (15.0) | |
| 180–419 | 7,541 (26.6) | 546 (24.1) | 3,706 (28.2) | 3,087 (26.1) | 202 (18.9) | |
| ≥ 420 | 2,370 (8.4) | 250 (11.0) | 1,113 (8.5) | 883 (7.5) | 124 (11.6) | |