title: A comparison of four epidemiological methods of assessing periodontal diseases. 1. Population findings.
mesh_terms: D000293:Adolescent; D000328:Adult; D003753:Dental Health Surveys; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D010510:Periodontal Diseases / Q000175:diagnosis*; D010512:Periodontal Index / Q000592:standards*; D012111:Residence Characteristics; D012424:Rural Population; D012737:Sex Factors; D014481:United States; D014505:Urban Population