Table 4 Comparison of inpatients and outpatients with pulmonary tuberculosis with regard to the factors associated with non-positive QuantiFERON results
| Covariates | Inpatients | P value | Outpatients | P value | ||
|---|---|---|---|---|---|---|
|
Positive QFT (n = 51) |
Non-positive QFT (n = 37) |
Positive QFT (n = 77) |
Non-positive QFT (n 16) | |||
| Laboratory findings | ||||||
| WBC, cells/μL | 8566 ± 3438 | 10604 ± 5464 | 0.050 | 7723 ± 2372 | 7526 ± 2212 | 0.761 |
| Lymphocytes, cells/μL | 1203 ± 509 | 885 ± 440 | 0.003 | 1 787 ± 642 | 1508 ± 504 | 0.105 |
| Lymphocytopenia* | 20 (39.2) | 24 (64.9) | 0.018 | 7 (9.3) | 1 (7.7) | 1.0 |
| Albumin, g/dL | 3.6 ±0.64 | 3.1 ± 0.59 | 0.003 | 4.4 ± 0.40 | 4.1 ± 0.56 | 0.051 |
| ESR, mm/hr | 60.5 ± 35.15 | 62. 5 ± 35.97 | 0.806 | 33.9 ± 27.1 | 58.1 ± 33.4 | 0.004 |
| CRP, mg/dL | 6.5 ± 6.21 | 8.3 ± 6.83 | 0.230 | 2.1 ± 2.92 | 0.44 ± 0.30 | 0.452 |
| Radiographic extent of disease | ||||||
| Mild | 19 (37.3 ) | 13 (35.1 ) | 0.589 | 55 (71.4 ) | 6 (37.5) | 0.020 |
| Moderate | 19 (37.3) | 11 (29.7 ) | 21 (27.3) | 10 (62.5) | ||
| Advanced | 13 (25.5) | 13 (35.1) | 1 (1.3) | 0 | ||