BMI, body composition, and the energy requirement for body weight gain in patients with anorexia nervosa

Sakino Yamashita, Keisuke Kawai, Takeharu Yamanaka, Takehiro Inoo, Hiroaki Yokoyama, Chihiro Morita, Masato Takii, Chiharu Kubo

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Abstract

Objective: Theories abound about the energy requirements for body weight gain in anorexia nervosa (AN). We hypothesized that malnutrition status affects the energy requirements. Method: On admission, 97 AN patients were measured for body composition by dual-energy X-ray absorptiometry. The relationship between body mass index (BMI) and body composition was investigated. In addition, 21 patients who completed our treatment program were tested for energy intake and body weight. Results: The relationship between BMI and both fat-free mass and fat mass (FM) on admission was curvilinear. The weight gain per excess energy was greater in the group of patients with FM < 4 kg or BMI < 14 kg/m 2 than in the group with FM ≥ 4 kg or BMI ≥ 14 kg/m2 (p = .037, p = .055, respectively). Discussion: The energy requirements for weight gain in AN patients are related to the initial FM and BMI.

Original languageEnglish
Pages (from-to)365-371
Number of pages7
JournalInternational Journal of Eating Disorders
Volume43
Issue number4
DOIs
Publication statusPublished - May 1 2010

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All Science Journal Classification (ASJC) codes

  • Psychiatry and Mental health

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