| Prevalence |
Up to 1% of the general population will have narcissistic personality disorder at some point in their lifetimes. |
| Comorbidity |
Common comorbid personality disorders include paranoid personality disorder and the other Cluster B (dramatic/erratic) personality disorders. Common psychological comorbid disorders are substance use disorders and anorexia nervosa. |
| Onset |
As with other personality disorders, symptoms must emerge by early adulthood. |
| Course |
People with narcissistic personality disorder may have a hard time adjusting to physical or occupational limitations that arise with advancing age. |
| Gender Differences |
Between 50% and 75% of those diagnosed with narcissistic personality disorder are male. |
| Source: Unless otherwise noted, the source is American Psychiatric Association, 2013. |