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Diagnostic reproducibility of periodontal indices
Author(s) -
Shaw L.,
Murray I. J.
Publication year - 1977
Publication title -
journal of periodontal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.31
H-Index - 83
eISSN - 1600-0765
pISSN - 0022-3484
DOI - 10.1111/j.1600-0765.1977.tb00117.x
Subject(s) - reproducibility , medicine , dentistry , orthodontics , mathematics , statistics
Relatively few studies have assessed the diagnostic reproducibility of periodontal indices. In the present investigation, the changes in Gingival Index and Plaque Index scores were measured by carrying out 203 duplicate examinations on 11–13 year old children. Reproducibility of diagnosis was assessed by applying the paired t test and the coefficient of linear correlation. There was no significant difference between the mean G.I. scores on first and second examinations both within and between examiners. High correlation coefficients of +0·81, +0·84 and +0·79 indicated that the ranking order of subjects was very similar on both occasions. However, the mean Pl.I. scores were significantly lower on the second examination compared with the first occasions for both participating examiners, although the correlations between first and second Pl.I. scores were comparable to those calculated for the G.I. data. In general the results indicated that PI. I. scores cannot be reproduced within a six‐hour period, but the ranting order of the subjects can be maintained.