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Table 6 Intra-observer kappa values with upper and lower confidence interval (CI) for proximal humerus fractures, calculated with or without taking “related” fractures into account (intermediate groups)

From: Validity of humerus fracture classification in the Swedish fracture register

  Without intermediate groups With intermediate groups
  Mean kappa value 95% CI Mean kappa value 95% CI
Rater 1 0.752 0.652 – 0.853 0.974 0.939 – 1.000
Rater 2 0.599 0.481 – 0.717 0.910 0.846 – 0.974
Rater 3 0.593 0.478 – 0.707 0.914 0.853 – 0.975