| TB-definite group (n = 12) | Other disease group (n = 33) | |
| Age (Median ± S.D.) | 75.5 ± 19.8 | 72.0 ± 10.9 |
| Gender (Male: Female) | 8:4 | 23:10 |
| Smoking history | 8 (67%) | 23 (70%) |
| Underlying disease | 9 (83%) | 33 (100%） |
| Respiratory disease | 4* (33%) | 29* (88%)# |
| Non-respiratory disease | 8* (67%) | 22* (67%) |
| Immunosuppressive treatment | 1 (8%) | 4 (12%) |
| Laboratory data | ||
| Peripheral blood | ||
| WBC (cells/µl) | 5040 ± 2150 | 5370 ± 550 |
| Lymphocyte (cells/µl) | 995 ± 555 | 1100 ± 106 |
| Total protein (g/dl) | 6.9 ± 0.6 | 6.9 ± 0.6 |
| Albumin (g/dl) | 3.3 ± 0.5 | 3.2 ± 0.5 |