Japan Psychiatric Dietetic Association.
Int J Psychiatry Med. 2012;44(2):171-81. doi: 10.2190/PM.44.2.h.
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.
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. The BMI data of these patients were compared to those of the general population in the 2009 National Health and Nutrition Survey conducted by the Japanese Ministry of Health.
The median BMI value in the patients was 21.6 kg/m2 (first quartile, 19.1; third quartile, 24.5). The percentages of BMI in obese, normal-weight, and underweight patients were 21.6%, 58.2%, and 20.2%, respectively. In the Japanese male patients, frequency of obesity was lower, and underweight was higher than those in the general population. In female patients, frequency of both obesity and underweight were higher than those in the general population.
Our results provided evidence that underweight as well as obesity is a characteristic in Japanese schizophrenia inpatients.
许多研究报告称，西方国家精神分裂症患者的肥胖率高于普通人群。本研究调查了日本全国住院精神分裂症患者的体重指数（BMI）状况。
研究对象为来自日本 47 个行政区的 15171 名住院精神分裂症患者（男性 7897 名，女性 7274 名）。将这些患者的 BMI 数据与日本厚生劳动省 2009 年全国健康和营养调查中的普通人群数据进行比较。
患者的 BMI 中位数为 21.6kg/m2（第一四分位数，19.1；第三四分位数，24.5）。肥胖、正常体重和体重不足患者的比例分别为 21.6%、58.2%和 20.2%。在日本男性患者中，肥胖的发生率较低，体重不足的发生率高于普通人群。在女性患者中，肥胖和体重不足的发生率均高于普通人群。
本研究结果表明，日本住院精神分裂症患者的特征不仅是肥胖，还有体重不足。
