title: Validity of the "Community Periodontal Index of Treatment Needs" (CPITN) for population periodontitis screening.
abstract: The aim of the present study was to validate two versions of CPITN for periodontitis diagnosis. A sample of 400 individuals underwent full mouth periodontal examination including Clinical Attachment Loss, Periodontal Pocket Depth, and Sub-gingival Calculus. Full and partial CPITN versions were derived from this exam (gold standard). Contingency tables were constructed and operational characteristics obtained, as well as ROC curves. The results show 58% sensitivity for full CPITN and 80.6% specificity. Positive and negative predictive values were 87% and 46.3%, respectively. According to the test, estimated periodontitis prevalence was 46%, while the figure obtained with the gold standard was 69%. The partial version of the CPITN showed 50% sensitivity and 87.1% specificity. Positive and negative predictive values were 89.6% and 43.9%, respectively. Estimated periodontitis prevalence, through partial CPITN, was 30.5%. Adjusted global agreement (kappa) for partial and full CPITN was 0.32 and 0.29, respectively. Both CPITN versions disagreed significantly with gold standard results (chi-square p < 0.001). As a conclusion, both total and partial CPITN failed to reflect the real periodontal status of the sample.
authors.affiliation: Universidade Luterana do Brasil, Rua Prudente de Morais 421, Novo Hamburgo, RS 93520-810, Canoas, Brasil. diego.bassani@gmail.com
authors.forename: Diego Garcia
authors.initials: DG
authors.lastname: Bassani
authors.forename: Carina Maciel
authors.initials: CM
authors.lastname: da Silva
authors.forename: Rui Vicente
authors.initials: RV
authors.lastname: Oppermann
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D001938:Brazil / Q000453:epidemiology; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D010512:Periodontal Index; D010518:Periodontitis / Q000175:diagnosis* / Q000453:epidemiology; D012424:Rural Population; D017678:Sex Distribution