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Table 2 Kappa statistics for assessment of inter-rater reliability

From: Dental caries in 14- and 15-year-olds in New South Wales, Australia

Index

No. of examiners

No. of teenagers

% agreement

Kappa

Weighted Kappa

Enamel Fluorosis/defect category *

14

55

94.4

0.89

0.90

Decayed, missing, filled or precavitated lesion category of individual teeth

14

72

95.8

0.82

NA#

Decayed, missing or filled category of individual teeth

14

72

98.8

0.92

NA

Decayed, filled or precavitated lesion category of individual surface

14

72

98.8

0.77

NA

Decayed or filled category of individual surface

14

72

99.8

0.89

NA

  1. *Teenagers were excluded if a non-fluorotic lesion was observed on the buccal surface or if a restoration or fixed orthodontic appliance was present on the labial coronal surface.
  2. #NA – not applicable. Weighted Kappa values were only calculated for fluorosis index where the categories are ordinal.