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Evaluation of accuracy and variability of scoring‐area‐based plaque indices
Author(s) -
Shaloub A.,
Addy M.
Publication year - 2000
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1034/j.1600-051x.2000.027001016.x
Subject(s) - medicine , dentistry , dental plaque , orthodontics
Background: Plaque scoring, using a variety of indices and methods, is widely used in clinical dentistry. There is limited information on inter‐ and intra‐examiner variability and almost no data on examiner accuracy. Aims: The aim of this study, was to determine the inter‐ and intra‐examiner variability and accuracy of 15 examiners, of differing plaque‐scoring experience, in recording and judging plaque areas from simulated plaque on tooth charts. Methods: Plaque, shaded red, was drawn onto tooth charts of 8 simulated “patients” and measured by planimetry by 1 investigator. For each tooth for each “patient”, examiners subjectively copied the plaque onto blank charts and scored plaque in 5% increments for the global plaque index. This was repeated on 2 occasions. Drawn plaque areas were determine by the investigator and comparisons made with the actual areas and % scores of plaque. Results: For both plaque recording methods, intra‐examiner variability was low and slighly better than inter‐examiner variability. Reproducing plaque areas showed a high level of accuracy in most examiners, as was judging areas in 5% increments, albeit slightly less accurate than area drawing. Overall examiner experience had little influence on judging plaque areas. Conclusion: The data suggest that area‐based plaque indices can be scored or recorded accurately and with minimal variability within or between examiners. The laboratory model could be used to train and assess examiners.