Table 2.
Sample characteristics per categorical predictor variable for the classification sample (N=3970) and the prediction subsample (n=2172).
| Characteristic | Classification sample, n (%) | Prediction subsample, n (%) | |||
| Age (years) | |||||
|
|
17 to 18 | 206 (5.2) | 134 (6.2) | ||
|
|
12 to 16 | 3764 (94.8) | 2038 (93.8) | ||
| Gender | |||||
|
|
Boy | 2246 (56.6) | 1416 (65.2) | ||
|
|
Girl | 1437 (36.2) | 756 (34.8) | ||
|
|
Other or prefer not to answer | 287 (7.2) | 0 (0) | ||
| Late gaming | |||||
|
|
At least sometimes | 3498 (88.1) | 1961 (90.3) | ||
|
|
Rarely | 390 (9.8) | 211 (9.7) | ||
|
|
Missing | 82 (2) | 0 (0) | ||
| Tried web-based gambling | |||||
|
|
Yes | 425 (10.7) | 234 (10.8) | ||
|
|
No | 3239 (81.6) | 1938 (89.2) | ||
|
|
Missing | 306 (7.7) | 0 (0) | ||
| In-game purchases | |||||
|
|
Yes | 3123 (78.7) | 1794 (82.6) | ||
|
|
No | 718 (18.1) | 378 (17.4) | ||
|
|
Missing | 129 (3.2) | 0 (0) | ||
| School community | |||||
|
|
Yes | 674 (17) | 456 (21) | ||
|
|
No | 3040 (76.6) | 1716 (79) | ||
|
|
Missing | 256 (6.4) | 0 (0) | ||
| Friendships | |||||
|
|
Difficult | 1782 (44.9) | 953 (43.9) | ||
|
|
Easy | 1964 (49.5) | 1219 (56.1) | ||
|
|
Missing | 224 (5.6) | 0 (0) | ||
| Detention | |||||
|
|
Several times | 767 (19.3) | 382 (17.6) | ||
|
|
Once or twice | 3112 (78.4) | 1790 (82.4) | ||
|
|
Missing | 91 (2) | 0 (0) | ||
| Aggression | |||||
|
|
Yes | 517 (13) | 235 (10.8) | ||
|
|
No | 3316 (83.5) | 1937 (89.2) | ||
|
|
Missing | 137 (3.5) | 0 (0) | ||
| Bullying | |||||
|
|
Bullied | 303 (7.6) | 135 (6.2) | ||
|
|
Not bullied | 3619 (91.2) | 2037 (93.8) | ||
|
|
Missing | 48 (1.2) | 0 (0) | ||
| Exercise (hours per day) | |||||
|
|
>1 | 3270 (82.4) | 1919 (88.4) | ||
|
|
≤1 | 501 (12.6) | 253 (11.6) | ||
|
|
Missing | 199 (5) | 0 (0) | ||
| Sense of safety | |||||
|
|
Unsafe | 471 (11.9) | 202 (9.3) | ||
|
|
Safe | 3422 (86.2) | 1970 (90.7) | ||
|
|
Missing | 77 (2) | 0 (0) | ||
| Food poverty | |||||
|
|
Yes | 683 (17.2) | 323 (14.9) | ||
|
|
No | 3234 (81.5) | 1849 (85.1) | ||
|
|
Missing | 53 (1) | 0 (0) | ||
| Abuse | |||||
|
|
Yes | 929 (23.4) | 457 (21) | ||
|
|
No | 3041 (76.6) | 1715 (79) | ||
| Anxiety | |||||
|
|
Above threshold | 561 (14.1) | 299 (13.8) | ||
|
|
Below threshold | 3077 (77.5) | 1873 (86.2) | ||
|
|
Missing | 332 (8.4) | 0 (0) | ||
| Depression | |||||
|
|
Above threshold | 743 (18.7) | 383 (17.6) | ||
|
|
Below threshold | 2899 (73) | 1789 (82.4) | ||
|
|
Missing | 328 (8.3) | 0 (0) | ||
| Insomnia | |||||
|
|
Yes | 561 (14.1) | 253 (11.6) | ||
|
|
No | 3346 (84.3) | 1919 (88.4) | ||
|
|
Missing | 63 (2) | 0 (0) | ||
| Loneliness | |||||
|
|
Lonely | 1720 (43.3) | 834 (38.4) | ||
|
|
Not lonely | 2172 (54.7) | 1338 (61.6) | ||
|
|
Missing | 78 (2) | 0 (0) | ||
| Self-harm | |||||
|
|
Yes | 738 (18.6) | 452 (20.8) | ||
|
|
No | 2348 (59.1) | 1720 (79.2) | ||
|
|
Missing | 884 (22.3) | 0 (0) | ||