title: [The statistical observations on questionnaires of periodontal patients (author's transl)].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000539:Alveolar Process / Q000000981:diagnostic imaging; D001862:Bone Resorption / Q000000981:diagnostic imaging; D004032:Diet; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009910:Oral Hygiene; D010510:Periodontal Diseases / Q000150:complications* / Q000000981:diagnostic imaging; D011859:Radiography; D012907:Smoking; D013223:Statistics as Topic