“…The two latter studies reflect clinical observations suggesting that among patients with bulimia nervosa, those with concomitant personality disorder diagnoses are the most challenging cases with the least favorable outcomes (Johnson, Tobin, & Enright, 1989). BPD appears to coexist in a large number of bulimic patients with prevalence rates ranging from 25% to 48% across the majority of studies (Cooper et al, 1988;Gartner, Marcus, Halmi, & Loranger, 1989;Gwirtsman, Roy-Byrne, Yager, & Gerner, 1983;Johnson et al, 1989;Levin & Hyler, 1986;Sansone, Seuferer, Fine, & Bovenzi, 1989;Schmidt & Telch, 1989;Wonderlich, Swift, Slotnick, & Goodman, 1990;Yager, Landsverk, Edetstein, & Hyler, 1989;Zanarini et al, 1990). The only dissenting study was by Pope, Frankenburg, Hudson, Jonas, & Yergelun-Todd (1987) in which only 1.9% of bulimia nervosa patients met criteria for BPD according to modified strict criteria on the Diagnostic Interview for Borderlines (DIB).…”