what percent of people have personality disorders
According to the largest study ever conducted on personality disorders (PD) by the U.S. National Institutes of Health (NIH), 5.9% of the U.S. population has BPD (Grant et al. 2008) and 6.2% has NPD (Stinson et al. 2008). As some people fit both diagnoses, about 10 percent of the U.S. population has BPD and/or NPD.