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 episode19.6 (5.0)19.2 (5.4)20.0 (5.6)0.87
First psychotic symptom15.7 (6.4)15.0 (6.4)16.2 (6.3)0.21
Major depressive disorder20.6 (5.1)21.3 (5.4)20.3 (5.0)0.038
Social anxiety11.6 (5.0)11.3 (4.7)11.7 (5.1)0.42
Cannabis abuse19.7 (3.1)19.8 (3.0)19.6 (3.2)0.65
Cannabis dependence19.8 (3.0)20. 0 (2.9)19.6 (3.0)0.39
Cannabis initiation17.7 (4.1)17.5 (2.8)17.9 (4.9)0.05
Alcohol initiation16.0 (1.8)15.8 (1.8)16.1 (1.8)  1.20E-05
Panic attack17.6 (5.5)16.8 (5.9)17.9 (5.3)0.11
Panic disorder with or without agoraphobia18.7 (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.