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Table 1 Agreement between the initial and each external coder for the four most frequently selected diagnoses

From: Reliability of diagnostic coding in intensive care patients

   Initial versus external coder 1 Initial versus external coder 2
  Number Kappa 95% CI Kappa 95% CI
J960, acute respiratory failure 78 0.26 0.06–0.46 0.25 0.06–0.43
J159, bacterial pneumonia, unspecified 31 0.49 0.22–0.76 0.26 0.03–0.56
I10, essential hypertension 25 0.52 0.25–0.79 0.26 0.06–0.59
I501, left ventricular failure 22 0.50 0.18–0.81 0.46 0.10–0.82
  1. CI, confidence interval.