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The Egyptian Journal of Bronchology

Table 7 Accuracy of YEARS algorithm: sensitivity 90%; specificity 65%; accuracy 80%

From: Predictive accuracy of years score in diagnosis of pulmonary embolism

 

CTPA results

Positive (30)

Negative (20)

Count

%

Count

%

Years score

Positive

27

90%

7

35%

Negative

3

10%

13

65%

Statistic

Value

95% CI

Sensitivity

90%

73.47 to 97.89%

Specificity

65%

40.78 to 84.61%

Positive predictive value

79.41%

62.10 to 91.30%

Negative predictive value

81.25%

54.35 to 95.95%

Accuracy

80.00%

66.28 to 89.97%

  1. Sensitivity=(Number of true positive results (TP) × 100)/(TP+FN)
  2. Specificity=(Number of true negative results (TN) × 100)/(TN+FP)
  3. Positive predictive value=(Number of true positive results (TP) × 100)/(TP+FP)
  4. Negative predictive value=(Number of true negative results (TN) × 100)/(TN+FN)
  5. Overall accuracy=((TP+TN) × 100)/(TP + TN + FP + FN )
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