Objective To describe the prevalence and distribution of panic disorder 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 panic disorder,then psychiatrists made diagnoses according to the fourth edition of Diagnostic and Statistical Manual of Mental Disorder(DSM-Ⅳ) ...