title: [The importance of indices in epidemiologic research on periodontal diseases].
authors.forename: P A
authors.initials: PA
authors.lastname: Leus
mesh_terms: D000367:Age Factors; D006801:Humans; D009911:Oral Hygiene Index; D010510:Periodontal Diseases / Q000453:epidemiology*; D010512:Periodontal Index; D012737:Sex Factors; D014586:USSR / Q000453:epidemiology
vernacular_title: Znachenie nekotorykh indeksov v épidemiologicheskikh issledovaniiakh bolezneĭ parodonta.