Baseline comparisons of sociodemographic, school and social relationships, depressive symptoms, substance use, and antisocial behaviour (see text for definitions)
| Control 1343 n (%)* | Intervention 1335 n (%)* | Total 2678 n (%)* | |
|---|---|---|---|
| *Percentages calculated on valid responses. | |||
| Sociodemographics | |||
| Gender | |||
| male | 623 (46.4) | 629 (47.1) | 1252 (46.8) |
| Family structure | |||
| two parent family | 1026 (76.4) | 1094 (81.9) | 2120 (79.2) |
| Australian born | 1223 (91.1) | 1119 (83.8) | 2342 (87.5) |
| Language other than English spoken at home | 293 (21.8) | 354 (26.5) | 647 (24.2) |
| Parental daily smoking | |||
| at least one parent smokes tobacco daily | 326 (24.3) | 264 (19.8) | 590 (22.0) |
| Quality of social relationships | |||
| Availability of attachments | |||
| good | 1133 (85.2) | 1088 (82.1) | 2221 (83.7) |
| poor | 115 (8.6) | 141 (10.6) | 256 (9.6) |
| absent/very poor | 82 (6.2) | 96 (7.2) | 178 (6.7) |
| Arguments with others | |||
| none | 758 (56.6) | 794 (59.5) | 1552 (58.0) |
| arguments with 1 or 2 people | 437 (32.6) | 444 (33.3) | 881 (32.9) |
| arguments with 3 or more people | 145 (10.8) | 96 (7.2) | 241 (9.0) |
| School relationships | |||
| Bullied | 724 (53.9) | 687 (51.5) | 1411 (52.7) |
| Low engagement with school | 492 (36.6) | 440 (33.0) | 932 (34.8) |
| Depressive symptoms | 253 (18.8) | 217 (16.3) | 470 (17.6) |
| Substance use | |||
| Alcohol | |||
| Drinker | 432 (32.2) | 397 (29.7) | 829 (31.0) |
| Regular drinker | 75 (5.6) | 62 (4.6) | 137 (5.1) |
| Binged | 174 (13.0) | 167 (12.5) | 341 (12.7) |
| Tobacco | |||
| Smoker (any) | 214 (15.9) | 201 (15.1) | 415 (15.5) |
| Regular | 38 (2.8) | 25 (1.9) | 63 (2.4) |
| Marijuana use | |||
| not used | 1112 (82.8) | 1205 (90.3) | 2317 (86.5) |
| <weekly | 55 (4.1) | 85 (6.4) | 140 (5.2) |
| ⩾weekly | 17 (1.3) | 27 (2.0) | 44 (1.6) |
| Friends’ substance use | |||
| Peers drinking | 512 (38.1) | 468 (35.1) | 980 (36.6) |
| Peers smoking | 125 (9.3) | 121 (9.1) | 246 (9.2) |
| Peers using marijuana | 31 (2.3) | 36 (2.7) | 67 (2.5) |
| Poly drug use (any) | 527 (39.2) | 475 (35.6) | 1002 (37.4) |