Importance of psychiatric disorders as comorbidities and complications among the acute in-patient cases in Japan

抄録

Number of patients with mental disorders is increasing in Japan. According to the Patient survey of 2008, the patient of mental disorders has increased from 2,181 thousands of 1996 to 3,233 thousands of 2008. Reflecting this situation, it becomes an important issue how to properly treat the mental disorders among the in-patients of acute somatic care hospitals. In order to clarify the actual situation, we have investigated the prevalence of psychiatric problem as comorbidities and complications among 2,170,720 cases from 900 DPC hospitals from 1^st July to 31^st October 2010. In total, 144,342 of 2,170,720 cases (6.6%) had some kinds of mental disorders. The highest percentage was observed for MDC01 (17,893 of 142,426 cases: 12.6%) followed by MDC16 (17,357 of 153,743 cases: 11.3%) and MDC10 (7,862 of 71,227 cases: 11.0%) except for MDC17 (Psychiatric DPC group: 100.0%). The highest disorder was dementia (P0+P9=32,788+13,539=46,327), followed by F3 (Mood disorders), F4 (Neurotic, stress-related and somatoform disorders) and F2 (Schizophrenia, schizotypal and delusional disorders). The present study has indicated the needs of psychiatric care are large in the Japanese acute somatic care hospitals.