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Table 1 Comparisons of patient characteristics and laboratory findings according to QFT-GIT results

From: Predictors for false-negative QuantiFERON-TB Gold assay results in patients with extrapulmonary tuberculosis

  QFT-GIT (−), n = 47, n(%) QFT-GIT (+), n = 114, n(%) Indeterminate, n = 2, n(%) p value*
Age, median, years (IQR, range) 51 (34, 22–83) 55 (27.2, 18–95) 66.5 0.09
Sex, male 25 (53.2%) 60 (52.6%) 0 (0%) 0.95
BMI, median, kg/m2 (IQR, range) 22.4 (4, 16.7–26.2) 22.1 (4.4, 19.2–25.7) 21.3 0.74
Underlying disease
 Diabetes mellitus 3 (6.4%) 13 (11.4%) 1 (50.0%) 0.33
 Hypertension 13 (27.7%) 28 (25.6%) 1 (50.0%) 0.68
 Malignancy 10 (21.3%) 22 (19.3%) 1 (50.0%) 0.19
  Solid cancer 3 14 1  
  Hematologic 7 8 0  
malignancy
 Chronic kidney disease 5 (10.6%) 7 (6.1%) 1 (50.0%) 0.32
 Autoimmune disease 3 (6.4%) 2 (1.8%) 1 (50.0%) 0.12
 Transplant 3 (6.4%) 6 (5.3%) 0 (0%) 0.78
 HIV infection 0 (0%) 1 (0.9%) 0 (0%) 0.52
Prior tuberculosis history 2 (4.3%) 16 (14.0%) 0 (0%) 0.07
Old fibrotic scar on chest X-ray 1 (2.1%) 18 (15.8%) 0 (0%) 0.015
Disseminated disease 0 (0%) 5 (4.4%) 0 (0%) 0.33
White blood cells, ×  109/L, median (IQR, range) 66.6 (58.6,17.1–173) 58.2 (48.0–79.6,10.1–206.7) 67.5 0.39
Total lymphocyte, × 109/L, median(IQR, range) 13.8 (13.2,2.6–49.2) 13.2 (10.2, 2.3–45.8) 7.5 0.62
Hemoglobin,g/dl, median (IQR, range) 11.75 (2.13, 7.4–28.20) 12.1 (3.2, 7.2–17.10) 8.85 0.36
ESR,mm/h, median (IQR, range) 46.0 (60.5, 2–120) 44.0 (54.4,3–120) 59.5 0.19
C-reactive protein, mg/dl, median (IQR, range) 1.87 (5.43,0.04–29.50) 2.03 (7.8,0.03–30.8) 1.11 0.79
Albumin, g/dl median(IQR, range) 3.5 (1.0,2.3–4.4) 3.5 (1.2,2.0–4.8) 2.9 0.52
  1. *Intermediate value was excluded
  2. ESR Erythrocyte sedimentation rate, BMI body mass index