Table 6.4Posttest Probability of Disease as a Function of Pretest Prevalence of Disease: Exercise Test

Posttest prevalence
Pretest prevalenceTest positiveTest negative
.05.16.02
.10.29.03
.15.40.05
.20.48.07
.25.56.09
.30.62.12
.35.67.14
.40.71.17
.45.75.20
.50.79.24
.55.82.28
.60.85.32
.65.87.37
.70.90.42
.80.94.56
.90.97.74

Test sensitivity = .75.

Test specificity = .80.

From: Chapter 6, Sensitivity, Specificity, and Predictive Value

Cover of Clinical Methods
Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition.
Walker HK, Hall WD, Hurst JW, editors.
Boston: Butterworths; 1990.
Copyright © 1990, Butterworth Publishers, a division of Reed Publishing.

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