| |
Diagnostic method
|
|---|
|
Parameters
|
Direct microscopy
|
Concentrated microscopy
|
rpoB
|
IS6110
|
D-PCR
|
|---|
|
Number of samples negative
|
77
|
75
|
66
|
63
|
62
|
|
Number of samples positive
|
46
|
48
|
57
|
60
|
61
|
|
Measures of diagnostic accuracy
|
|
Sensitivity (%)
|
86.3
|
90.2
|
88.2
|
92.2
|
94.1
|
|
Specificity (%)
|
97.2
|
97.2
|
83.3
|
81.9
|
81.9
|
|
PPV
|
0.96
|
0.96
|
0.79
|
0.78
|
0.79
|
|
NPV
|
0.91
|
0.93
|
0.91
|
0.94
|
0.95
|
|
LR+
|
30.8
|
32.2
|
5.3
|
5.1
|
5.2
|
|
LR-
|
0.14
|
0.1
|
0.14
|
0.1
|
0.07
|
- PPV (positive predictive value); NPV (negative predictive value); LR+ (positive likelihood ratio); LR- (negative likelihood ratio)
