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.

Hazemba et al. Annals of General Psychiatry 2008 7:6   doi:10.1186/1744-859X-7-6