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Table 3 Cohen’s Kappa for distinguishing viral from bacterial pneumonia on lung ultrasound between two blinded sonologists

From: Prospective application of clinician-performed lung ultrasonography during the 2009 H1N1 influenza A pandemic: distinguishing viral from bacterial pneumonia

  Viral Pneumonia Normal Bacterial Pneumonia  
Viral Pneumonia 13 1 0 14
Normal 1 4 0 5
Bacterial Pneumonia 0 1 7 8
  14 6 7 27
Cohen’s Kappa = 0.82 95% CI (0.63 to 0.99)