The researchers interviewed participants and counted the number of people who had a specific mental disorder for the first time in their lives any time between 2004 and 2005. The figures don't include people with longstanding conditions.
- 1.7% developed alcohol dependency
- 1.51% developed major depression
- 1.12% developed generalized anxiety disorder
- 1.02% developed alcohol abuse
- 0.62% developed any panic disorder
- 0.53% developed bipolar I disorder
- 0.44% developed a phobia
- 0.32% developed drug dependency
- 0.32% developed social phobia
- 0.28% developed drug abuse
- 0.21% developed bipolar II disorder
"Incidence rates of substance, mood, and anxiety disorders were comparable to or greater than rates of lung cancer, stroke, and cardiovascular disease," write the researchers, who included Bridget Grant, PhD, of the National Institute on Alcohol Abuse and Alcoholism.
Men were more likely than women to report alcoholism and other substance use disorders. Women were more likely than men to report depression and anxiety. No gender trends were seen for bipolar disorder.
All of the disorders were most common in younger participants. That finding "underscores the need for increased vigilance in identifying and treating these disorders among young adults," Grant and colleagues write.