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Table 2 Consistency between baseline and follow-up QFT-GIT stratified by TST

From: Predictors of persistently positive Mycobacterium-tuberculosis-specific interferon-gamma responses in the serial testing of health care workers

  

Follow-up QFT-GIT

 
 

Baseline QFT-GIT

Positive (n = 15)

n (%)

Negative (n = 163)

n (%)

Agreement

All subjects*

(n = 178)

Positive (n = 18)

12 (6.7)

6 (3.4)

Raw = 94.9%

Îş = 0.70#

 

Negative (n = 160)

3 (1.7)

157 (88.2)

 

Positive prior TST

(n = 54)

Positive (n = 9)

9 (16.7)

0

Raw = 100%

Îş = 1.0#

 

Negative (n = 45)

0

45 (83.3)

 

Recent TST > 5 mm

(n = 51)

Positive (n = 10)

9 (17.6)

1 (2.0)

Raw = 94.1%

Îş = 0.82#

 

Negative (n = 41)

2 (3.9)

39 (76.5)

 

Recent TST ≥ 10 mm

(n = 44)

Positive (n = 10)

9 (20.5)

1 (2.3)

Raw = 93.2%

Îş = 0.81#

 

Negative (n = 34)

2 (4.5)

32 (72.7)

 
  1. *Four individuals with indeterminate QFT-GIT results were excluded from this analysis. #p < 0.0001, each. QFT-GIT = QuantiFERON®-TB Gold In-Tube. TST = tuberculin skin test.
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BMC Infectious Diseases

ISSN: 1471-2334

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