Effect of adapted interpersonal psychotherapy versus health education on mood and eating in the laboratory among adolescent girls with loss of control eating.
OBJECTIVE Interpersonal psychotherapy (IPT) is aimed at improving negative affect that is purported to contribute to the development and maintenance of loss of control (LOC) eating. Although youth who report LOC over eating tend to consume more snack foods than those without LOC, it is unknown if IPT impacts objective energy intake. METHODS To test if IPT improves mood and eating in the laboratory, we examined a sample of 88 girls with LOC eating who were randomized to either IPT (n 46) or a standard of care health education (HE) group program. At baseline, and 6 month (follow up 1) and 1 year (follow up 2) following the initiation of the groups, girls consumed lunch from a multi item meal with an instruction designed to model a LOC episode. Girls also reported mood state immediately before each meal. RESULTS Girls in IPT experienced no significant changes in pre meal state depressive affect, while girls in HE experienced a non significant improvement by follow up 1 and then returned to baseline by follow up 2 (p .04) We found no significant group difference for changes in total intake relative to girls' daily energy needs (p's .25) However, IPT reduced, while HE increased, the percentage of daily energy needs consumed from snack foods by follow up 2 (p .04) Within groups, HE increased their snack food intake from follow up 1 to follow up 2 (p .01) CONCLUSIONS In adolescent girls with LOC, IPT did not change total intake at the test meal and was associated with reduced snack food intake. Data are required to determine if IPT effectively prevents excess weight gain in the longer term. (c) 2015 Wiley Periodicals, Inc. (Int J Eat Disord 2016; 49:490 498)
The International journal of eating disorders