Table 1 Bivariate analysis of the factors associated with cannabis and amphetamine use
Variables | Weighted N | Weighted % | Past-month cannabis use | Lifetime amphetamine use | |||
|---|---|---|---|---|---|---|---|
Yes (%) | p-values | Yes (%) | p-values | ||||
Demographic | Â | Â | Â | Â | Â | Â | |
Gender |  |  |  | < 0.001 |  | < 0.001 | |
| Â | Male | 7335 | 47.2 | 459 (6.3) | Â | 294 (4.01) | Â |
| Â | Female | 8218 | 52.8 | 224 (2.7) | Â | 181 (2.2) | Â |
Mental health factors | Â | Â | Â | Â | Â | Â | |
|  | Loneliness |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 8809 | 58.8 | 457 (5.1) | Â | 313 (3.5) | Â |
| Â | No | 6542 | 41.2 | 209 (3.3) | Â | 145 (2.3) | Â |
|  | Anxiety |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 8809 | 57.4 | 477 (5.4) | Â | 346 (3.9) | Â |
| Â | No | 6542 | 42.6 | 183 (2.8) | Â | 106 (1.6) | Â |
|  | Suicidal ideation |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 2533 | 16.7 | 195 (7.7) | Â | 161 (6.4) | Â |
| Â | No | 12,673 | 83.3 | 410 (3.2) | Â | 243 (1.9) | Â |
|  | Suicidal attempt |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 2485 | 16.2 | 278 (11.2) | Â | 261 (10.5) | Â |
| Â | No | 12,828 | 83.8 | 379 (3.0) | Â | 183 (1.4) | Â |
Lifestyle factors | Â | Â | Â | Â | Â | Â | |
|  | Cigarette smoking |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 1319 | 8.6 | 404 (30.6) | Â | 222 (16.8) | Â |
| Â | No | 13,960 | 91.4 | 220 (1.6) | Â | 202 (1.5) | Â |
|  | Past-month alcohol use |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 3460 | 23.4 | 458 (13.2) | Â | 265 (7.7) | Â |
| Â | No | 11,322 | 76.6 | 156 (1.4) | Â | 135 (1.2) | Â |
|  | Lifetime drunkenness |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 2811 | 18.7 | 418 (14.9) | Â | 237 (8.4) | Â |
| Â | No | 12,203 | 81.3 | 167 (1.4) | Â | 136 (1.1) | Â |
|  | Leisure-time sedentary behaviour |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 5037 | 33.0 | 356 (7.1) | Â | 223 (4.4) | Â |
| Â | No | 10,209 | 67.0 | 291 (2.9) | Â | 221 (2.2) | Â |
School-level factors | Â | Â | Â | Â | Â | Â | |
|  | Truancy |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 3767 | 24.7 | 392 (10.4) | Â | 275 (7.3) | Â |
| Â | No | 11,489 | 75.3 | 250 (2.2) | Â | 160 (1.4) | Â |
|  | Bullying victimization |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 5224 | 36.3 | 347 (6.6) | Â | 292 (5.6) | Â |
| Â | No | 9194 | 63.7 | 262 (2.9) | Â | 117 (1.3) | Â |
| Â | Social support at school | Â | Â | Â | 0.275 | Â | 0.009 |
| Â | Yes | 12,211 | 79.9 | 518 (4.2) | Â | 333 (2.7) | Â |
| Â | No | 3070 | 20.1 | 144 (4.7) | Â | 123 (4.0) | Â |
Interpersonal-level factors | Â | Â | Â | Â | Â | Â | |
|  | Number of close friends |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 13,707 | 10.3 | 546 (4.0) | Â | 346 (2.5) | Â |
| Â | No | 1589 | 89.6 | 92 (5.8) | Â | 89 (5.6) | Â |
|  | Physical fight |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 4594 | 29.8 | 406 (8.8) | Â | 304 (6.6) | Â |
| Â | No | 10,830 | 70.2 | 265 (2.5) | Â | 163 (1.5) | Â |
Family-level factors | Â | Â | Â | Â | Â | Â | |
|  | Parental supervision |  |  |  | < 0.001 |  | 0.084 |
| Â | Yes | 11,750 | 76.9 | 452 (3.9) | Â | 330 (2.8) | Â |
| Â | No | 3533 | 23.1 | 205 (5.8) | Â | 119 (3.4) | Â |
| Â | Parental understanding | Â | Â | Â | 0.004 | Â | 0.101 |
| Â | Yes | 11,542 | 75.7 | 458 (4.0) | Â | 326 (2.8) | Â |
| Â | No | 3703 | 24.3 | 188 (5.1) | Â | 124 (3.4) | Â |
|  | Parental monitoring |  |  |  | 0.006 |  | < 0.001 |
| Â | Yes | 11,652 | 76.3 | 469 (4.0) | Â | 309 (2.7) | Â |
| Â | No | 3625 | 23.7 | 184 (5.1) | Â | 139 (3.5) | Â |
|  | Parental intrusion of privacy |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 8248 | 45.8 | 388 (5.6) | Â | 283 (4.1) | Â |
| Â | No | 8248 | 54.2 | 260 (3.2) | Â | 160 (1.9) | Â |
|  | Parental tobacco use |  |  |  | < 0.001 |  | < 0.001 |
| Â | Yes | 2354 | 15.3 | 282 (12.0) | Â | 186 (7.9) | Â |
| Â | No | 13,020 | 84.7 | 369 (2.8) | Â | 265 (2.0) | Â |