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Table 3 Contingency table for the “diagnostic test”

From: Emergency physician’s dispatch by a paramedic-staffed emergency medical communication centre: sensitivity, specificity and search for a reference standard

  Reference Standard (dichotomized NACA on-site)
  RS-1 NACA 4, 5, 6, 7 res NACA 0, 1, 2, 3, 7 no res
  RS-2 NACA 5, 6, 7 res NACA 0, 1, 2, 3, 4, 7 no res
EP dispatched as 1st line response True Positive False Positive
No EP dispatched as 1st line response False Negative True Negative