OCD - Epidemiology

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Epidemiology

Measures of occurrence

Incidence measures Base rate Incidence density (aka Incidence rate) Hazard rate Cumulative incidence Prevalence measures Lifetime prevalence Point prevalence Period prevalence

Measures of association

Relative measures Risk ratio Rate ratio Odds ratio Hazard ratio Absolute measures Risk/rate/incidence difference Attributable risk Attributable risk in exposed Percent attributable risk Levin’s attributable risk

Other measures

Mortality rate and Morbidity Case fatality Sensitivity (tests) Specificity (tests) Survival analysis

By mental health disorder

Anxiety Depression OCD Panic disorder Personality disorder Psychosis Schizophrenia Category:Mental health epidemiology

• OCD: incidence
• OCD: prevalence
• OCD: morbidity
• OCD: mortality
• OCD: racial distribution
• OCD: age distribution
• OCD: sex distribution

Demographic Features of OCD

Obsessive-Compulsive Disorder tends to be slightly more common in females than in males. Moreover, females are somewhat more likely to have lifetime prevalence of this disorder than are men (2.9% versus 2.0%). In a 1980s study of 20,000 adults from New Haven, Baltimore, St. Louis, Durham, and Los Angeles, the lifetime prevalence rate of OCD for both genders was recorded at 2.5%.

In regards to education, it was found that the lifetime prevalence of OCD is lower for those that have graduated high school as opposed to those who have not (1.9% versus 3.4%). However, in the case of college education, lifetime prevalence is higher for those who graduate with a degree (3.1%) than it is for those who have only some college background (2.4%). As far as age is concerned, the onset of OCD usually ranges from the late teenage years until the mid-twenties in both genders, but the age of onset tends to be slightly younger in males than in females (Antony, Downie, & Swinson, 1998).