Assay

(N = 40)

TB culture

Sensitivity

(%)

Specificity

(%)

PPV

(%)

NPV

(%)

Accuracy

(%)

positive

negative

LFD-LAMP TB positive

28

5

96.6

(82.2 - 99.9)

54.5

(23.4 - 83.3)

84.8

(68.1 - 94.9)

85.7

(42.1 - 99.6)

85

LFD-LAMP TB negative

1

6

Xpert MTB/RIF ultrat positive

29

7

100

(88.1 - 100)

36.4

(10.9 - 69.2)

80.6

(64 - 91.8)

100

(39.8 - 100)

82.5

Xpert MTB/RIF ultrat negative

0

4