Depressive symptoms and weight change in inpatients with anorexia nervosa: A cross-lagged panel model

• Published in: Journal of psychosomatic research Vol. 172; p. 111391
• Main Authors: Meule, Adrian, Kolar, David R., Gärtner, Thomas, Osen, Bernhard, Rauh, Elisabeth, Naab, Silke, Voderholzer, Ulrich
• Format: Journal Article
• Language: English
• Published: England Elsevier Inc 01.09.2023
• Subjects: Adolescent; Adult; Anorexia nervosa; Anorexia Nervosa - complications; Anorexia Nervosa - therapy; Body Mass Index; Depression; Female; Humans; Inpatient treatment; Inpatients; Male; Treatment Outcome; Weight Gain; Body mass index; Depression; Anorexia nervosa; Weight gain; Inpatient treatment
• ISSN: 0022-3999; 1879-1360
• DOI: 10.1016/j.jpsychores.2023.111391

Anorexia nervosa (AN) is marked by a high rate of comorbid depression, which raises the question whether depressive symptoms may adversely affect treatment outcome. Thus, we examined whether depressive symptoms at admission would predict weight change from admission to discharge in a large sample of inpatients with AN. In addition, we also explored the reverse direction, that is, whether body mass index (BMI) at admission would predict changes in depressive symptoms. A sample of 3011 adolescents and adults with AN (4% male) who received inpatient treatment at four Schoen Clinics was analyzed. Depressive symptoms were measured with the Patient Health Questionnaire–9. BMI significantly increased and depressive symptoms significantly decreased from admission to discharge. BMI and depressive symptoms were unrelated at admission and discharge. Higher BMI at admission predicted smaller decreases in depressive symptoms and higher depressive symptoms at admission predicted larger weight gain. The latter effect, however, was mediated by longer length of stay. Results indicate that depressive symptoms do not adversely affect weight gain during inpatient treatment in persons with AN. Instead, higher BMI at admission is predictive of smaller improvements in depressive symptoms but this effect seems to be negligible in terms of clinical relevance. •Body weight and depressive symptoms were unrelated cross-sectionally.•Body weight and depressive symptoms were related longitudinally but with negligible effect sizes.•Depressive symptoms do not adversely affect weight gain in inpatients with anorexia nervosa.