Women are predominantly diagnosed with BPD, with studies estimating a 3:1 female-to-male diagnostic ratio in clinical settings. Previous studies present conflicting findings regarding gender-level criterion differences, with some indicating differences in contradictory criteria. These studies primarily utilize outpatient samples, highlighting gaps in the literature. Thus, the current study investigates gender-level criterion differences, functioning, and impairment within a novel, partial hospital sample. Participants included (a) a sample of 1,153 individuals from the total population of partial hospital patients regardless of BPD diagnosis and (b) 365 BPD-positive patients who were assessed via semistructured clinical interview and provided consent for data collection during the intake process. Results indicated that (a) women endorsed higher relationship instability than men and (b) there were no significant differences in level of functioning across the gender subsamples. Examining gender differences in BPD symptomatology has clinical implications in improving recognition and addressing potential biases associated with men and mental health.
Keywords: borderline personality disorder; criterion differences; gender; recognition; relationship instability.