Table 4.
Differences in the age of onset for males and females
| Mean age of onset (SD) | Mean age of onset males (SD) | Mean age of onset females (SD) | P values males versus females | |
| Manic episode | 19.6 (5.0) | 19.2 (5.4) | 20.0 (5.6) | 0.87 |
| First psychotic symptom | 15.7 (6.4) | 15.0 (6.4) | 16.2 (6.3) | 0.21 |
| Major depressive disorder | 20.6 (5.1) | 21.3 (5.4) | 20.3 (5.0) | 0.038 |
| Social anxiety | 11.6 (5.0) | 11.3 (4.7) | 11.7 (5.1) | 0.42 |
| Cannabis abuse | 19.7 (3.1) | 19.8 (3.0) | 19.6 (3.2) | 0.65 |
| Cannabis dependence | 19.8 (3.0) | 20. 0 (2.9) | 19.6 (3.0) | 0.39 |
| Cannabis initiation | 17.7 (4.1) | 17.5 (2.8) | 17.9 (4.9) | 0.05 |
| Alcohol initiation | 16.0 (1.8) | 15.8 (1.8) | 16.1 (1.8) | 1.20E-05 |
| Panic attack | 17.6 (5.5) | 16.8 (5.9) | 17.9 (5.3) | 0.11 |
| Panic disorder with or without agoraphobia | 18.7 (5.7) | 20.4 (5.0) | 18.3 (5.9) | 0.22 |
Age of onset was not collected for alcohol abuse, dependence and use disorder. We reported age at first drink (initiation), age at first intoxication and age of ‘regular use’ (one drink a month for 6 months) have also been collected.
After multiple testing correction are shown in bold.