Table 1 Baseline comparison of demographic and clinical characteristics between the PTB and non-PTB groups
|  | PTB (n = 875) | Non-PTB (n = 408) | P-value |
|---|---|---|---|
Characteristics | Â | Â | Â |
Sex | Â | Â | 0.344 |
Male, n (%) | 522 (59.7%) | 232 (56.9%) | Â |
Female, n (%) | 353 (40.3%) | 176 (43.1%) | Â |
Age, years | 42.7 ± 7.3 | 44.5 ± 7.4 | 0.263 |
BMI, kg/m2 | 20.2 ± 2.8 | 21.1 ± 3.2 | 0.143 |
QuantiFERON-TB ( +), n (%) | 706 (80.7%) | 119 (29.2%) |  < 0.01 |
Presenting symptoms or signs | |||
No special clinical symptoms, n (%) | 194 (22.2%) | 72 (17.6%) | 0.065 |
Non-productive cough, n (%) | 562 (64.2%) | 276 (67.6%) | 0.231 |
Productive cough, n (%) | 435 (49.7%) | 225 (55.1%) | 0.072 |
Chest tightness and/or wheezing, n (%) | 177 (20.2%) | 98 (24.0%) | 0.123 |
Fever, n (%) | 161 (18.4%) | 91 (22.3%) | 0.113 |
Fatigue, n (%) | 110 (12.6%) | 44 (10.8%) | 0.407 |
Thoracalgia, n (%) | 93 (10.6%) | 52 (12.7%) | 0.265 |
Hemoptysis and/or blood in phlegm, n (%) | 92 (10.5%) | 49 (12.0%) | 0.444 |
Inappetence, n (%) | 59 (6.7%) | 19 (4.7%) | 0.168 |
Weight loss, n (%) | 47 (5.4%) | 18 (4.4%) | 0.498 |
Radiological characteristics | Â | Â | Â |
Involvement extent of lung lesions | Â | Â | 0.111 |
 ≤ 3 lobes, n (%) | 621 (71.0%) | 307 (75.2%) |  |
 ≥ 4 lobes, n (%) | 254 (29.0%) | 101 (24.8%) |  |
Cavitary, n (%) | 245 (28.0%) | 98 (24.0%) | 0.134 |
Underlying disease | Â | Â | Â |
COPD, n (%) | 43 (4.9%) | 23 (5.6%) | 0.585 |
Bronchiectasis, n (%) | 66 (7.5%) | 37 (9.1%) | 0.349 |
Diabetes, n (%) | 132 (15.1%) | 22 (5.4%) |  < 0.01 |
Previous history of tuberculosis, n (%) | 224 (25.6%) | 96 (23.5%) | 0.425 |
Specimen | Â | Â | 0.521 |
Sputum, n (%) | 657 (75.1%) | 312 (76.5%) | Â |
BALF, n (%) | 187 (21.4%) | 78 (19.1%) | Â |
Pulmonary puncture fluid, n (%) | 31 (3.5%) | 18 (4.4%) | Â |