Table 1.
Sample characteristics of the study cohort.
| Overall (N = 538,577) |
Female (N = 336,032) |
Male (N = 202,545) |
||||
|---|---|---|---|---|---|---|
| No. individuals at different agesa (%) | ||||||
| 6–17 years | 31,280 | (5.8 %) | 19,533 | (5.8%) | 11,747 | (5.8%) |
| 18–24 years | 91,365 | (17.0%) | 58,415 | (17.4%) | 32,950 | (16.3%) |
| 25–39 years | 186,571 | (34.6%) | 117,453 | (35.0%) | 69,118 | (34.1%) |
| 40–49 years | 123,795 | (23.0%) | 77,476 | (23.1%) | 46,319 | (22.9%) |
| 50–59 years | 105,566 | (19.6%) | 63,155 | (18.8%) | 42,411 | (20.9%) |
| No. individuals at different educationb levels (%) | ||||||
| Compulsory school (≤9 years) | 47,887 | (8.9%) | 27,125 | (8.1%) | 20,762 | (10.3%) |
| Upper secondary school | 247,278 | (45.9%) | 150,786 | (44.9%) | 96,492 | (47.6%) |
| University | 234,399 | (43.5%) | 152,767 | (45.5%) | 81,632 | (40.3%) |
| No information | 9013 | (1.7%) | 5354 | (1.6%) | 3659 | (1.8%) |
| Mean length of full follow-up, yrs | 4.6 | 4.7 | 4.6 | |||
| No. individuals with event (%) | ||||||
| Year before initiation | 6745 | (1.3%) | 4169 | (1.2%) | 2576 | (1.3%) |
| Suicide attempts | 6745 | (1.3%) | 4169 | (1.2%) | 2576 | (1.3%) |
| Year after initiation | 6385 | (1.2%) | 4311 | (1.3%) | 2074 | (1.0%) |
| Suicide attempts | 6080 | (1.2%) | 4222 | (1.3%) | 1858 | (1.0%) |
| Death by suicide | 346 | (0.1%) | 104 | (<0.1%) | 242 | (0.1%) |
| Full follow-up | 25,090 | (4.7%) | 15,455 | (4.6%) | 9635 | (4.8%) |
| Suicide attempts | 23,934 | (4.4%) | 15,087 | (4.5%) | 8847 | (4.4%) |
| Death by suicide | 1703 | (0.3%) | 601 | (0.2%) | 1102 | (0.5%) |
aAt first SSRI treatment initiation.
bHighest level of commenced education between the index individual and his/her parents in the calendar year before the year of initiation.