Table 2.
Characteristics of 1 109 475 men included in analyses. Values are numbers (percentages) unless stated otherwise
| Characteristics | IQ score | |||
|---|---|---|---|---|
| 1 or 2 (n=104 448) | 3 or 4 (n=275 006) | 5 or 6 (n=443 512) | 7, 8, or 9 (n=286 509) | |
| Mean (SD) age (years) | 18.3 (0.6) | 18.2 (0.6) | 18.3 (0.6) | 18.4 (0.6) |
| Mean (SD) height (cm) | 177.3 (6.7) | 178.4 (6.5) | 179.4 (6.4) | 180.4 (6.4) |
| Mean (SD) body mass index (kg/m2) | 21.9 (3.4) | 21.8 (3.0) | 21.6 (2.7) | 21.4 (2.5) |
| Mean (SD) systolic blood pressure (mm Hg) | 128.5 (11.0) | 128.4 (10.8) | 128.5 (10.8) | 128.6 (10.9) |
| Parents in non-manual occupation | 20 816 (19.9) | 81 949 (29.8) | 196 478 (44.3) | 176 538 (61.6) |
| Participant in non-manual occupation | 7 814 (7.5) | 42 403 (15.4) | 116 188 (26.2) | 118 296 (41.3) |
| University educated | 3 561 (3.4) | 31 603 (11.5) | 145 599 (32.8) | 192 593 (67.2) |
| Any psychosis* | 2 728 (2.6) | 3 665 (1.3) | 3 947 (0.9) | 1 988 (0.7) |
| Any hospital admission for attempted suicide† | 3 851 (3.7) | 6 182 (2.2) | 5 631 (1.3) | 2 072 (0.7) |
*Based on conscription examination or hospital admissions pre-dating any admissions for attempted suicide.
†Includes undetermined injuries.