Feasibility and preliminary effectiveness of a cognitive-behavioral, family-centered partial hospitalization program for adolescents with anorexia nervosa and atypical anorexia nervosa at six- and twelve-month follow-up

This study examined the feasibility and preliminary effectiveness of a cognitive-behavioral, family-centered partial hospitalization program (PHP) for adolescents with anorexia nervosa (AN) and atypical AN (AAN), and described the outpatient services received following discharge. Participants (N = 31) completed anthropometric and self-report assessments at admission, discharge, and six and twelve months after discharge from the PHP. Descriptive statistics explored markers of feasibility. Paired samples t-tests evaluated changes in weight and eating disorder (ED) symptomatology from admission to discharge, admission to six-month follow-up, and admission to twelve-month follow-up. Descriptive statistics and effect sizes compared symptoms at each timepoint between participants with AN and AAN. Results indicated that we were successful at recruiting greater than 50% of adolescents approached for this study. We collected follow-up data from more than 70% of participants at discharge, but did not meet this retention benchmark at six-month and twelve-month follow-ups. The entire sample demonstrated significant improvements in weight and ED symptomatology from admission to discharge, and generally maintained these improvements at six- and twelve-month follow-up. While descriptive statistics suggested that participants with AN and AAN received similar outpatient services following discharge from the PHP, those with AN experienced greater improvement in self-reported ED symptomatology than those with AAN at six- and twelve-month follow-up. These findings provide preliminary support for the efficacy of PHPs in treating adolescents with AN and AAN. Further research with larger sample sizes should investigate whether adolescents with AAN experience poorer outcomes than those with AN following discharge from a PHP.