Frequency of borderline personality disorder in a sample of French high school students

Objective: To estimate the frequency of borderline personality disorder (BP D) in French high school students. Method. A random sample of high school students (n=1363) ranging in age fro m 13 to 20 years agreed to complete a questionnaire, the Screening Test for Comorbid Personality Disorders (STCPD); 107 of them volunteered to be inte rviewed. We assessed this group using the Revised Diagnostic Interview for Borderlines (DIB-R). We conducted a regression analysis to determine a cut- off for BPD diagnosis with the STCPD. Results: We estimated the overall frequency of BPD to be 10% for boys and 1 8% for girls. After apeak of frequency at age 14 years for both sexes, the frequency increased significantly again in late adolescence. Conclusion: This study found a high frequency of BPD in French adolescents, which adds to questions regarding the validity of diagnosing this disorder in adolescents.