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Table 2 Agreement between QFT-GIT and TST, stratified by BCG vaccination status

From: In-hospital contact investigation among health care workers after exposure to smear-negative tuberculosis

  

QFT-GIT, n (%)

 

TST >5 mm

Positive

Negative

Agreement

All subjects

Positive

7 (4.9)

33 (23.1)

Raw = 72.7%

 

Negative

6 (4.2)

97 (67.8)

Îş = 0.15

BCG vaccinated

Positive

3 (4.1)

22 (30.1)

Raw = 64.4%

 

Negative

4 (5.5)

44 (60.3)

Îş = 0.04

No BCG

Positive

3 (5.4)

7 (12.5)

Raw = 85.8%

 

Negative

1 (1.8)

45 (80.4)

Îş = 0.36

 

TST >10 mm

Positive

Negative

Agreement

All subjects

Positive

7 (4.9)

22 (15.4)

Raw = 79.7%

 

Negative

6 (4.2)

108 (75.5)

Îş = 0.19

BCG vaccinated

Positive

3 (4.1)

15 (20.5)

Raw = 74.0%

 

Negative

4 (5.5)

51 (69.9)

Îş = 0.12

No BCG

Positive

2 (3.6)

3 (5.4)

Raw = 91.1%

 

Negative

2 (3.6)

49 (87.5)

Îş = 0.40

  1. Kappa (κ) values with statistically significant p values are printed bold. P values for TST >5 mm: All subjects, p = 0.048; BCG vaccinated, p = 0.69; no BCG, p = 0.016. P values for TST >10 mm: All subjects, p = 0.021; BCG vaccinated, p = 0.35; No BCG, p = 0.036. BCG = Bacillus Calmette-Guérin; QFT-GIT = QuantiFERON®-TB Gold in Tube; TST = tuberculin skin test.