Vulnerability to risk and awareness of dual choice of health insurance plan.
D000328:Adult; D000367:Age Factors; D001294:Attitude to Health; D003710:Demography; D004522:Educational Status; D005191:Family Characteristics; D006123:Group Practice; D006801:Humans; D007182:Income; D007348:Insurance, Health; D007350:Insurance, Hospitalization; D007357:Insurance, Physician Services; D007750:Labor Unions; D008913:Minority Groups; D012067:Religion; D012111:Residence Characteristics; D012923:Social Class; D012959:Socioeconomic Factors