Taiwan: A random population of subjects from the National Health Insurance database was used to identify members with ≥1 claim for a principal diagnosis of schizophrenia.[Chien et al., 2004]
China: A random population of subjects from Xinjin County were interviewed face to face to assess the prevalence of schizophrenia based on the Chinese Classification and Diagnostic Criteria of Mental Disorder (CCMD-2-R) and the International Classification of Diseases, 10th Revision (ICD-10).[Ran et al., 2003]
Korea: A multistage, cluster sampling design was used to randomly select persons who were administered the Korean version of Composite International Diagnostic Interview 2.1 (K-CIDI 2.1) to diagnose mental disorders including schizophrenia.[Cho et al., 2007]
Micronesia: The Mental Health section of the Bureau of Health Services for the Trust Territory of the Pacific Islands surveyed the population of Micronesia for individuals with signs and symptoms of mental illness. Subjects were diagnosed using the Diagnostic and Statistical Manual of Mental Disorders, Second Edition (DSM-II) criteria.[Dale et al., 1981]
Japan: Epidemiological studies of schizophrenia have been conducted from 1940 to 1978 in rural, urban, island, and small town settings.[Nakane et al., 1992]
References:
Chien IC, Chou YJ, Lin CH, Bih SH, Chou P, Chang HJ. Prevalence and incidence of schizophrenia among national health insurance enrollees in Taiwan, 1996-2001.
Psychiatry Clin Neurosci. 2004; 58 (6): 611-618.
Ran MS, Xiang MZ, Li SX, et al. Prevalence and course of schizophrenia in a Chinese rural area. Aust N Z J Psychiatry. 2003; 37 (4): 452-457.
Cho MJ, Kim JK, Jeon HJ, et al. Lifetime and 12-month prevalence of DSM-IV psychiatric disorders among Korean adults. J Nerv Ment Dis. 2007; 195 (3): 203-210.
Dale PW. Prevalence of schizophrenia in the Pacific Island populations of Micronesia. J Psychiatr Res. 1981; 16 (2): 103-111.
Nakane Y, Ohta Y, Radford MH. Epidemiological studies of schizophrenia in Japan. Schizophr Bull. 1992; 18 (1): 75-84.