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During 2011-2014, results overall indicate a high level of data quality and substantial examiner reliability for tooth count and dentition; reliability for periodontal disease, across various assessments, was at least moderate. When comparing the 2011-2014 examiner performance to findings from 2003 to 2004, comparable concordance between the examiners and the reference examiner exists.
Dye et al. (Wed,) studied this question.