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Table 5 Test accuracy for Groups A+B versus C (n = 22).

From: The effects of beta-blockers on dobutamine-atropine stress echocardiography: early protocol versus standard protocol

Frequency Results A+B C Total
neg 3 1 4
  20.00 14.29  
Pos 12 6 18
  80.00 85.71  
Total 15 7 22
  1. neg = negative test pos = positive test