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Table 2 Diagnostic accuracy of the prediction rule for ACS

From: Validation of a diagnostic probability function for estimating probabilities of acute coronary syndrome

Two-by-two table of observed versus predicted ACS

Rule

ACS present

ACS absent

Sum

Pred. probability ≥2% (ACS pos.)

27

128

155

Pred. probability <2% (ACS neg.)

4

27

31

Sum

31

155

186

Number of ACS cases versus deciles of predicted probability

Predicted probability of ACS

Number of patients

Number of ACS cases

 

0% - <10%

67

5

 

10% - <20%

27

1

 

20% - <30%

26

2

 

30% - <40%

12

4

 

40% - <50%

11

2

 

50% - <60%

8

2

 

60% - <70%

7

2

 

70% - <80%

8

3

 

80% - <90%

10

5

 

90% - <100%

10

5

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