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. 2013 Dec 10;8(12):e82916. doi: 10.1371/journal.pone.0082916

Table 8. The relationship between prevalence and the positive and negative predicted values of the IHC test.

IHC Test of Sensitivity: 83%, Specificity: 97%
IHC Test of Sensitivity: 83%, Specificity: 100%
Hypothetic Prevalence of IBD (n=94) PPV NPV PPV NPV
5% 57% 99% 100% 99%
15% 79% 96% 100% 96%
64% 98% 77% 100% 77%
80% 98% 58% 100% 59%

PPV: Positive predicted value; NPV: Negative predicted value.