Table 1.
Sample description of study participants in the Beijing 2003 Global School-Based Survey
| Factor | Total, n (%)* | Male, n (%)* | Female, n (%)* |
| Age | |||
| ≤12 | 274 (12.6) | 125 (11.8) | 142 (12.8) |
| 13 | 588 (25.5) | 256 (23.0) | 332 (28.3) |
| 14 | 788 (32.6) | 373 (32.1) | 415 (33.4) |
| 15 | 560 (23.5) | 293 (25.7) | 267 (21.4) |
| 16+ | 136 (5.8) | 84 (7.5) | 52 (4.2) |
| Sex | |||
| Male | 1131 (50.5) | - | - |
| Female | 1210 (49.5) | - | - |
| Loneliness | |||
| Yes | 1354 (57.2) | 607 (53.6) | 746 (61.2) |
| No | 990 (42.8) | 521 (46.4) | 463 (38.8) |
| Worried | |||
| Yes | 1169 (49.3) | 514 (45.4) | 652 (53.4) |
| No | 1174 (50.7) | 613 (54.6) | 557 (46.6) |
| Sad/hopeless | |||
| Yes | 442 (19.0) | 222 (19.9) | 217 (18.0) |
| No | 1888 (81.0) | 895 (80.1) | 989 (82.0) |
| Had close friend | |||
| Yes | 2163 (92.4) | 1044 (92.7) | 1114 (92.2) |
| No | 177 (7.6) | 81 (7.3) | 94 (7.8) |
| Smoked cigarettes | |||
| Yes | 205 (9.2) | 177 (16.2) | 27 (2.1) |
| No | 2101 (90.8) | 917 (83.8) | 1178 (97.9) |
| Drank alcohol | |||
| Yes | 278 (12.9) | 187 (18.1) | 91 (7.8) |
| No | 1917 (87.1) | 854 (81.9) | 1056 (92.2) |
| Ever been drunk | |||
| Yes | 184 (8.0) | 132 (11.8) | 52 (4.2) |
| No | 2139 (92.0) | 988 (88.2) | 1144 (95.8) |
| Missed classes | |||
| Yes | 112 (4.9) | 70 (6.3) | 41 (3.5) |
| No | 2227 (95.1) | 1055 (93.7) | 1166 (96.5) |
| Parental supervision | |||
| Always | 585 (25.3) | 265 (23.7) | 318 (26.8) |
| Not always | 1752 (74.7) | 858 (76.3) | 889 (73.2) |
| Bullied | |||
| Yes | 439 (20.0) | 244 (23.0) | 194 (17.0) |
| No | 1777 (80.0) | 816 (77.0) | 955 (83.0) |
*n = unweighted frequency; weighted percentages were used.