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Table 3 Number of correct classification and results of Cohen Kappa analysis

From: The effectiveness of ultrasonography in verifying the placement of a nasogastric tube in patients with low consciousness at an emergency center

Evaluation method Correct placement Incorrect placement K p
Radiology 44*(93.6) 3 (6.4)   
Ultrasound 39 (83.0) 8 (17.0) 0.299 0.018
Auscultation 46 (97.9) 1 (2.1) 0.484 <0.001
pH measuring 32 (86.5) 5 (13.5) 0.444 0.005
  1. *Number (%).
  2. pH measuring: The contents were not aspirated in 10 patients.