| |
No. of specimens with indicated results by culture and clinical data (n= 971)a
| | | | |
|---|
| |
TB (n= 59)
|
no TB (n= 912)
| | | | |
|---|
| |
FT MTB pos
|
FT MTB neg
|
FT MTB pos
|
FT MTB neg
|
Sensitivity
|
Specificity
|
PPV
|
NPV
|
|---|
|
Smear microscopy
|
(%)
|
(%)
|
(%)
|
(%)
|
(95% CI)
|
(95% CI)
|
(95% CI)
|
(95% CI)
|
|---|
|
Smear positive
|
43
|
0
|
0
|
3
|
100
|
100
|
100
|
100
|
| |
(82.7)
|
(0)
|
(0)
|
(0.3)
|
(89.7-100)
|
(30.9-100)
|
(89.7-100)
|
(30.9-100)
|
|
Smear negative
|
9
|
7
|
10
|
899
|
56.3
|
98.9
|
47.3
|
99.2
|
| |
(17.3)
|
(100)
|
(100)
|
(99.7)
|
(30.5-79.2)
|
(97.9-99.4)
|
(25.2-70.5)
|
(98.3-99.6)
|
|
All
|
52
|
7
|
10
|
902
|
88.1
|
98.9
|
83.8
|
99.2
|
|
(76.4-94.6)
|
(97.9-99.4)
|
(72.8-91.5)
|
(98.3-99.6)
|
-
aTB, tuberculosis; pos, positive; neg, negative; PPV, positive predictive value; NPV, negative predictive value.
