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Table 2 Performance of QFT-GIT for diagnosis of active TB

From: QuantiFERON-TB Gold In-tube test for the diagnosis of active and latent tuberculosis in selected health facilities of Addis Ababa, Ethiopia

Category

Nb

QFN, N (%)

Positive, N (%)

Negative, N (%)

Intermediate, N (%)

HIV positive

21

9 (42.9)

11 (52.4)

1 (4.8)

HIV negative

115

66 (57.4)

48 (41.7)

1 (0.9)

CD4 < 200 cells/µl

25

11 (44.0)

13 (52.0)

1 (4)

CD4 ≥ 200 cells/µl

112

65 (58.0)

46 (41.1)

1 (0.9)

Smear positive

12

5 (41.7)

7 (58.3)

a

Smear negative

124

70 (56.5)

52 (41.9)

2 (1.6)

Culture positive

37

26 (70.3)

10 (27.0)

1 (2.7)

Culture negative

99

49 (49.5)

49 (49.5)

1 (1.0)

BCG vaccinated

40

23 (57.5)

17 (42.5)

a

BCG not vaccinated

96

52 (54.2)

42 (43.8)

2 (2.0)

Sputum with blood

28

19 (67.9)

9 (32.1)

a

Breath shortness

90

52 (57.8)

38 (42.2)

a

Night sweats

99

53 (53.5)

44 (44.4)

2 (2.1)

Chest pain

110

64 (58.2)

45 (40.9)

1 (0.9)

Weight loss

91

49 (53.8)

40 (44.0)

2 (2.2)

  1. aIntermediate results were not found
  2. bIn all the percentage calculations, N was taken as denominator