Objective To stacly the current prevalence and distribution of various types of somatoform disorders in Baoding.Methods From Oct.2004 to Mar.2005,Stratified multi-stage cluster randomization was used to identify 10073 subjects aged 18 years or over in Baoding.An expanded version of the General Health Questionnaire(GHQ-12) was used to identify subjects at high,moderate and low risk for having a somatoform disorder,then psychiatrists made diagnoses according to the fourth edition of Diagnostic and Statistical...