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Table 4 Age at selected percentiles on the standardized age of onset distributions of disorders

From: Prevalence and age-of-onset distributions of DSM IV mental disorders and their severity among school going Omani adolescents and youths: WMH-CIDI findings

Diagnosis group

Disorder

AOO*

Percentile 25

AOO Percentile 50

AOO Percentile 75

Anxiety

Specific phobia

7

13

22

 

Any Anxiety

8

18

22

Mood

MDD with hierarchy

16

18

19

 

Any mood disorder

16

19

20

Impulse control

IED with hierarchy

13

18

20

All diagnosis

Any diagnosis

11

18

22

  1. *Age of Onset.