Early change in gastric‐specific anxiety sensitivity as a predictor of eating disorder treatment outcome.

Eating disorders (EDs) are often accompanied by gastrointestinal (GI) distress. Anxiety sensitivity is the tendency to interpret sensations of anxiety as threatening or dangerous, and includes both broad physical symptoms (e.g., elevated heartrate) and GI‐specific symptoms. Physical and GI‐specific anxiety sensitivity may be important risk and maintaining factors in EDs. This study tested the hypothesis that greater reductions in both types of anxiety sensitivity during the first month of treatment would predict lower ED symptoms and trait anxiety at discharge and 6‐month follow‐up. Patients (n = 424) in ED treatment reported physical and GI‐specific anxiety sensitivity, ED symptoms, and trait anxiety at treatment admission, 1‐month into treatment, discharge, and 6‐month follow‐up. Analyses were conducted with hierarchical linear regression with imputation, controlling for relevant covariates. Results indicated that early reduction in GI‐specific but not general physical anxiety sensitivity predicted both lower ED symptoms and lower trait anxiety at discharge and 6‐month follow‐up. These findings demonstrate the importance of GI‐specific anxiety sensitivity as a potential maintaining factor in EDs. Developing and refining treatments to target GI‐specific anxiety sensitivity may have promise in improving the treatment not only of EDs, but also of commonly co‐morbid anxiety disorders. Highlights: Anxiety sensitivity, the fear of symptoms of anxiety, is common in eating disorders (EDs), and may predict treatment outcomes.In this study, greater reduction in anxiety sensitivity for gastrointestinal symptoms within the first month of ED treatment predicted lower ED symptoms and anxiety at discharge from treatment but not 6‐month follow‐up. By contrast, reduction in more general physical anxiety sensitivity did not predict ED symptoms or anxiety at discharge or follow‐up.Findings highlight the importance of targeting anxiety about body sensations in treatment for EDs. [ABSTRACT FROM AUTHOR]