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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.