Sample description for the total sample and by labour market participation (N=874)
| Age* | Total sample (N=874) | Labour market participation | ||
| Paid job (N=733) | No paid job (N=141) | |||
| Sex, N (%) | 11 | |||
| Males | 334 (38.2) | 278 (37.9) | 56 (39.7) | |
| Females | 540 (61.8) | 455 (62.1) | 85 (60.3) | |
| Educational attainment, N (%) | 26 | |||
| Low | 59 (6.8) | 30 (4.1) | 29 (20.6) | |
| Medium | 342 (39.1) | 271 (37.0) | 71 (50.4) | |
| High | 473 (54.1) | 432 (58.9) | 41 (29.1) | |
| Internalising problems, scale score (mean, SD) Range 0.00–2.00 | 11 | 0.37 (0.23) | 0.36 (0.23) | 0.41 (0.23) |
| 13 | 0.35 (0.24) | 0.34 (0.24) | 0.40 (0.26) | |
| 16 | 0.33 (0.24) | 0.32 (0.24) | 0.39 (0.27) | |
| 19 | 0.25 (0.24) | 0.23 (0.22) | 0.34 (0.27) | |
| 22 | 0.27 (0.24) | 0.24 (0.22) | 0.40 (0.32) | |
| Internalising problems > 80th percentile (N, %) | 11 | 153 (17.5) | 121 (16.5) | 32 (22.7) |
| 13 | 159 (18.2) | 128 (17.5) | 31 (22.0) | |
| 16 | 170 (19.5) | 139 (19.0) | 31 (22.0) | |
| 19 | 168 (19.2) | 115 (15.7) | 53 (37.6) | |
| 22 | 169 (19.3) | 116 (15.8) | 53 (37.6) | |
| Onset (N, %) | ||||
| No internalising problems | 489 (55.9) | 432 (58.9) | 52 (36.9) | |
| Early onset (at age 11 or 13) | 247 (28.3) | 196 (26.7) | 51 (36.2) | |
| Late onset (at age ≥16) | 138 (15.8) | 105 (14.3) | 38 (27.0) | |
| Duration (N, %) | ||||
| No internalising problems | 489 (55.9) | 432 (58.9) | 52 (36.9) | |
| Short duration (1 or 2 times) | 262 (30.0) | 207 (28.2) | 53 (37.6) | |
| Long duration (≥3 times) | 123 (14.1) | 94 (12.8) | 36 (25.5) | |
| Externalising problems, scale score (mean, SD) Range 0.00–2.00 | 11 | 0.27 (0.19) | 0.26 (0.19) | 0.29 (0.21) |
| 13 | 0.28 (0.19) | 0.27 (0.18) | 0.33 (0.21) | |
| 16 | 0.30 (0.20) | 0.29 (0.20) | 0.35 (0.22) | |
| 19 | 0.22 (0.19) | 0.20 (0.18) | 0.29 (0.24) | |
| 22 | 0.19 (0.17) | 0.18 (0.16) | 0.27 (0.22) | |
| Externalising problems > 80th percentile (N, %) | 11 | 163 (18.6) | 130 (17.7) | 33 (23.4) |
| 13 | 148 (16.9) | 114 (15.6) | 34 (24.1) | |
| 16 | 174 (19.9) | 133 (18.1) | 41 (29.1) | |
| 19 | 167 (19.1) | 130 (17.7) | 37 (26.2) | |
| 22 | 155 (17.7) | 117 (16.0) | 38 (27.0) | |
| Onset (N, %) | ||||
| No externalising problems | 477 (54.6) | 418 (57.0) | 59 (41.8) | |
| Early onset (at age 11 or 13) | 241 (27.6) | 190 (25.9) | 51 (36.2) | |
| Late onset (at age ≥16) | 156 (17.8) | 125 (17.1) | 31 (22.0) | |
| Duration (N, %) | ||||
| No externalising problems | 477 (54.6) | 418 (57.0) | 59 (41.8) | |
| Short duration (1 or 2 times) | 279 (31.9) | 227 (31.0) | 52 (36.9) | |
| Long duration (≥3 times) | 118 (13.5) | 88 (12.0) | 30 (21.3) | |
*Age at which variable was measured.