From: Higher blood volumes improve the sensitivity of direct PCR diagnosis of blood stream tuberculosis among HIV-positive patients: an observation study
TP
FP
FN
TN
Sensitivity, % (95% CI)
Specificity, % (95% CI)
PPV, %
NPV, %
Concordance, %
Study A (n=42)
3
1
6
32
33(8–70)
97(84–100)
75
84
83
Study B (n=31)
5
2
23
71(29–96)
96(79–100)
92
90