Table 4 Comparison between patients with concordant and persistent indeterminate interferon-γ release assay results (n = 66).

From: Effects of acute critical illnesses on the performance of interferon-gamma release assay

 

Paired QFT-GIT results

P value

Positive-positive or negative-negative

Indeterminate-indeterminate

(n = 31)

(n = 35)

Age, years

62 ± 13

62 ± 14

0.957

Male sex

15 (48)

20 (57)

0.477

Body mass index, kg/m2

24 ± 5

23 ± 4

0.333

APACHE II score

<15

15 (48)

6 (17)

0.001

15–25

14 (45)

14 (40)

 

>25

2 (7)

15 (43)

 

Active or history of TB

2 (7)

2 (6)

1.000

Admitting diagnoses

Respiratory

11 (36)

17 (49)

0.283

Gastrointestinal

3 (10)

6 (17)

 

Cardiovascular

7 (23)

2 (6)

 

Neurologic

5 (16)

4 (11)

 

Others

5 (16)

6 (17)

 

Comorbidities

Hypertension

17 (55)

19 (54)

0.964

Malignancy

12 (39)

13 (37)

0.896

Diabetes mellitus

8 (26)

15 (43)

0.147

Cerebrovascular accident

6 (19)

9 (26)

0.538

Liver cirrhosis

5 (16)

5 (14)

1.000

Heart failure

5 (16)

5 (14)

1.000

End-stage renal disease

2 (7)

3 (9)

1.000

ICU events

Blood transfusion

15 (48)

23 (66)

0.155

Use of vasopressors

10 (32)

18 (51)

0.116

Renal replacement therapy

5 (16)

9 (26)

0.342

Lab testing

Haemoglobin, g/dl

11.2 ± 3.0

10.2 ± 2.4

0.154

White blood cells, k/mcl

11.2 ± 8.1

13.1 ± 6.9

0.309

Lymphocytes, k/mcl

1.3 ± 1.0

1.0 ± 1.0

0.247

Albumin, g/dl

<2.6

6 (19)

19 (54)

0.009

2.6–3

10 (32)

9 (26)

 

>3

15 (48)

7 (20)

 

Hospital mortality

1 (3)

9 (26)

0.015

  1. APACHE, acute physiology and chronic health evaluation; ICU, intensive care unit; QFT-GIT, QuantiFERON-TB Gold In-Tube; TB, tuberculosis.