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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