Comorbidity is described as the co-occurrence of two disorders. What proportion of people with obsessive-compulsive disorder also meet the criteria for major depressive disorder?

1. Comorbidity means two disorders occurring together in the same person, and the manual reports it disorder by disorder. 2. For obsessive-compulsive disorder, 41% of those affected also meet the criteria for major depressive disorder. 3. The figure of 6 in 10 belongs to substance use disorder, where that share also carry another mental illness. 4. The smaller percentages given here are lifetime prevalence figures for separate disorders, not comorbidity rates. _Source: OpenStax Psychology (1st ed., CC BY 4.0), Ch 15 "Psychological Disorders", section 15.2 Diagnosing and Classifying Psychological Disorders_