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Table 5 Inter-rater agreement, RC1 (1st abstraction) vs. RC2

From: Reliability of medical record abstraction by non-physicians for orthopedic research

Data elements Kappa 95% CI % Agreement
Index knee 1.00 (1.00, 1.00) 100
Bilateral operation 1.00 (1.00, 1.00) 100
Arthroplasty approach type 0.49 (0.00, 1.00) 97.3
Cement fixation - - 100
Lateral release type 0.66 (0.49, 0.83) 86.3
Posterior cruciate ligament recession 0.79 (0.64, 0.95) 91.8
Knee alignment 0.66 (0.52, 0.79) 77.5
Knee predominant compartment 0.65 (0.49, 0.80) 80.3