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Table 2 Intra and inter examiner reliability

From: Prevalence of periodontitis and alveolar bone loss in a patient population at Harvard School of Dental Medicine

ExaminerSite/ToothICC Individual (95% CI)ICC Average (95% CI)P value
Intra MM30.92 (0.87–0.95)0.96 (0.93–0.97)P <  0.0001
Intra HM30.92 (0.86–0.95)0.95 (0.92–0.97)P <  0.0001
Inter M & HM30.80 (0.68–0.87)0.88 (0.81–0.93)P <  0.0001
Inter M & HD130.95 (0.92–0.97)0.97 (0.95–0.98)P <  0.0001
  1. N = 80 subjects. Examiner 1 (M), had 0.92 agreement (95% CI 0.87–0.95) for repeated individual measurements and 0.96 (95% CI 0.93–0.97) for averages agreement for intra-examiner reliability comparing the first and second times measurements of alveolar bone level for the mesial site of tooth number 3 for the same subset. Examiner 2 (H), had an agreement of 0.92 (95% CI 0.86–0.95) for individual measurements and 0.96 (95% CI 0.92–0.97) for averages agreement for the same variable. We also had excellent agreement for inter-examiner reliability between the two examiners. For example, consistency of agreement for inter-examiner reliability comparing the alveolar bone level measurement on the mesial site of tooth number 3 is 0.80 (95% CI 0.68–0.87) for individual measurements and 0.88 (95% CI 0.81–0.93) for average agreement for the same subset. Another example of higher agreement is shown for the distal side of tooth number 13