Listen now (9 mins) | Adolph Stern coined the term "borderline" in 1938. In 1980, it was officially recognized as a diagnosis. Since then, the borderline category has become so widely used that it is now assigned to 20% of psychiatric patients and is estimated to affect 3 to 5% of the general population, based on a study carried out by Frances & Widiger in 1986. Females account for roughly two-thirds of those who have a borderline personality disorder. Borderline Personality Disorder is one among ten recognized by the DSM IV. According to Widiger & Weissman, this accounts for approximately 15% of the population in psychiatric settings and about 50% of patients with personality disorders.