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Table 3 Contingency tables

From: Prehospital lung ultrasound for the diagnosis of cardiogenic pulmonary oedema: a pilot study

   Audit  
   CPOa Present CPOa absent Total
A
Clinical CPOa present 14 4 18
Assessment CPOa absent 4 18 22
  Total 18 22 40
B
PLUS IS present 17 5 22
  IS absent 1 17 18
  Total 18 22 40
  1. a CPO cardiogenic pulmonary oedema