[Survey of obesity and underweight among inpatients with schizophrenia in psychiatric hospitals throughout Japan].

Aim: Many studies have reported a high prevalence of obesity in patients with schizophrenia compared to the general population. However, no nationwide survey of schizophrenic inpatients has been conducted in Japan. The aims of this study were to conduct a large-scale survey of BMI among hospitalized patients with schizophrenia in Japan, identify the prevalence of obesity and underweight, and examine its associated factors.

Body mass index of inpatients with schizophrenia in Japan.

Objective: Many studies reported that obesity rate in the Western countries is higher in schizophrenia patients than in general population. In this study, we surveyed nationwide Body Mass Index (BMI) status of hospitalized Japanese schizophrenia patients.

Methods: Subjects included 15,171 patients (7,897 men and 7,274 women) hospitalized for schizophrenia, who were sampled from all 47 administrative divisions in Japan.