Table 1 Characteristics of the analytic cohort at the first questionnaire round (2004) and in relation to poor mental health at follow up 2010 (N=1589)
| Â | All | Girls | Boys | Poor mental healtha |
|---|---|---|---|---|
n (%) | n (%) | n (%) | n (%) | |
Gender | ||||
 Girls | 887 (56) | 354 (40) | ||
 Boys | 702 (44) | 239 (34) | ||
Variables–2004 | ||||
Physical activity | ||||
Number of weekly hours | ||||
 None | 20 (1) | 12 (1) | 8 (1) | 8 (40) |
 1/2 hour | 51 (3) | 30 (3) | 21 (3) | 28 (55) |
 1 hour | 161 (10) | 92 (10) | 69 (10) | 61 (38) |
 2-3 hours | 412 (26) | 261 (30) | 151 (21) | 185 (45) |
 4-6 hours | 575 (36) | 324 (37) | 251 (36) | 195 (34) |
 7 hours or more | 370 (24) | 168 (19) | 202 (29) | 116 (31) |
Body Mass Index | ||||
 Low (<17) | 135 (9) | 73 (8) | 62 (9) | 53 (39) |
 Normal (17/23.29b/23.94c) | 1292 (81) | 746 (84) | 546 (78) | 467 (36) |
 Overweight (> 23.29b/23.94c) | 162 (10) | 68 (8) | 94 (13) | 73 (45) |
Mental health (14/15 yr) | ||||
 Good | 1067 (67) | 562 (63) | 505 (72) | 334 (31) |
 Poor | 522 (33) | 325 (37) | 197 (28) | 259 (50) |
Yearly household incomed | ||||
 Lowest | 367 (23) | 207 (23) | 160 (23) | 161 (44) |
 Middle | 589 (37) | 331 (37) | 258 (37) | 228 (39) |
 Highest | 633 (40) | 349 (40) | 284 (40) | 204 (32) |
Highest household education | ||||
 <10 years | 157 (10) | 88 (10) | 69 (10) | 69 (44) |
 10-12 years | 799 (50) | 468 (53) | 331 (47) | 296 (37) |
 13-15 years | 515 (32) | 270 (30) | 245 (35) | 191 (37) |
 >15 years | 118 (8) | 61 (7) | 57 (8) | 37 (31) |