TABLE 3.
Psychiatric conditions by age group
| All | By age group | p‐value | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18–19 | 20–24 | 25–29 | 30–34 | 35–39 | 40+ | ||||||||||
| (N = 4657) | (N = 353) | (N = 863) | (N = 874) | (N = 744) | (N = 614) | (N = 1209) | |||||||||
| N | % | N | % | N | % | N | % | N | % | N | % | N | % | ||
| Mood, depression, anxiety or OCD | |||||||||||||||
| Anxiety disorder (e.g., GAD) except for social anxiety | 2583 | 55.5 | 177 | 50.1 | 477 | 55.3 | 491 | 56.2 | 438 | 56.6 | 378 | 61.6 | 577 | 47.7 | <0.001 |
| Social anxiety disorder/social phobia | 1698 | 36.5 | 94 | 26.6 | 309 | 35.8 | 318 | 36.4 | 296 | 38.2 | 261 | 42.5 | 420 | 34.7 | <0.001 |
| Separation anxiety | 528 | 11.3 | 40 | 11.3 | 101 | 11.7 | 104 | 11.9 | 93 | 12 | 71 | 11.6 | 119 | 9.8 | 0.53 |
| Obsessive–compulsive disorder | 1127 | 24.2 | 76 | 21.5 | 218 | 25.3 | 219 | 25.1 | 198 | 25.6 | 159 | 25.9 | 257 | 21.3 | 0.046 |
| Hoarding | 239 | 5.1 | 6 | 1.7 | 38 | 4.4 | 34 | 3.9 | 43 | 5.6 | 40 | 6.5 | 78 | 6.5 | 0.001 |
| Depression or dysthymia | 2464 | 52.9 | 140 | 39.7 | 460 | 53.3 | 448 | 51.3 | 440 | 56.8 | 333 | 54.2 | 643 | 53.2 | <0.001 |
| Bipolar (manic‐depressive) disorder | 755 | 16.2 | 41 | 11.6 | 144 | 16.7 | 185 | 21.2 | 124 | 16 | 97 | 15.8 | 164 | 13.6 | <0.001 |
| Any anxiety disorders (first 3) | 3064 | 65.8 | 209 | 59.2 | 567 | 65.7 | 591 | 67.6 | 515 | 69.2 | 442 | 72.0 | 722 | 59.7 | <0.001 |
| Any affective disorder (last 3) | 2719 | 58.4 | 153 | 43.3 | 510 | 59.1 | 522 | 59.7 | 474 | 63.7 | 362 | 59.0 | 698 | 57.7 | <0.001 |
| Any emotional/affective disorder (any of the above eight disorders) | 3557 | 76.4 | 241 | 68.3 | 663 | 76.8 | 687 | 78.6 | 590 | 79.3 | 483 | 78.7 | 893 | 73.9 | <0.001 |
| Attention and behavior disorders | |||||||||||||||
| ADHD (attention deficit‐hyperactivity disorder) or ADD | 2049 | 44 | 174 | 49.3 | 422 | 48.9 | 432 | 49.4 | 313 | 42.1 | 264 | 43.0 | 444 | 36.7 | <0.001 |
| Conduct disorder | 88 | 1.9 | 5 | 1.4 | 11 | 1.3 | 16 | 1.8 | 15 | 2.0 | 15 | 2.4 | 26 | 2.2 | 0.59 |
| Oppositional defiant disorder | 264 | 5.7 | 39 | 11.0 | 49 | 5.7 | 64 | 7.3 | 39 | 5.2 | 37 | 6.0 | 36 | 3.0 | <0.001 |
| Intermittent explosive disorder | 107 | 2.3 | 7 | 2.0 | 13 | 1.5 | 20 | 2.3 | 23 | 3.1 | 16 | 2.6 | 28 | 2.3 | 0.43 |
| Any disruptive disorder (any of the above 4) | 2117 | 45.5 | 180 | 50.1 | 433 | 50.2 | 442 | 50.6 | 322 | 43.3 | 277 | 45.1 | 463 | 38.3 | <0.001 |
| Schizophrenia, other psychosis or schizoaffective disorder | 211 | 4.5 | 12 | 3.4 | 41 | 4.8 | 42 | 4.8 | 44 | 5.9 | 31 | 5.0 | 41 | 3.4 | 0.13 |
| Tourette's or tic disorder | 191 | 4.1 | 18 | 5.1 | 47 | 5.4 | 38 | 4.3 | 25 | 3.4 | 24 | 3.9 | 39 | 3.2 | 0.13 |
| Other psychiatric condition | 527 | 11.3 | 39 | 11.0 | 99 | 11.5 | 70 | 8.0 | 75 | 10.1 | 77 | 12.5 | 167 | 13.8 | 0.002 |
| Overall psychiatric morbidity | |||||||||||||||
| Any lifetime disorder (excluding other psychiatric condition) | 3895 | 83.6 | 276 | 78.2 | 738 | 85.5 | 757 | 86.6 | 634 | 85.2 | 528 | 86.0 | 962 | 79.6 | <0.001 |
| Any lifetime disorder | 4011 | 86.1 | 290 | 82.2 | 764 | 88.5 | 769 | 88.0 | 650 | 87.4 | 542 | 88.3 | 996 | 82.4 | <0.001 |
| Personality disorder | 576 | 12.4 | 19 | 5.4 | 85 | 9.8 | 113 | 12.9 | 108 | 14.5 | 92 | 15.0 | 159 | 13.2 | <0.001 |
| Eating disorder | 503 | 10.8 | 33 | 9.3 | 105 | 12.2 | 90 | 10.3 | 88 | 11.8 | 71 | 11.6 | 116 | 9.6 | 0.34 |
| Any lifetime disorder (including personality disorders and eating disorder) | 4041 | 86.8 | 293 | 83 | 755 | 87.5 | 771 | 88.2 | 652 | 87.6 | 548 | 89.3 | 1011 | 83.6 | <0.001 |