Recent studies estimate that 18 million or more Americans (almost 6 percent of the population) exhibit primary symptoms of BPD, and many studies suggest this figure is an underestimation. 1 Approximately 10 percent of psychiatric outpatients and 20 percent of inpatients, and between 15 and 25 percent of all patients seeking psychiatric care, are diagnosed with the disorder. It is one of the most common of all of the personality disorders.
