TB group (n=52) NTM group (n=58) Other disease group (n=28)
Age (Median ± S.D.) 72.5 ± 18.5 69.5 ± 13.9 70.5 ± 18.5
Sex (Male : Female) 30:22:00 23:35 17:11
Smoking history (+) 30 (58%) 20 (34%) 14 (50%)
Underlying disease (+) (with  repetition) 43 (83%) 39 (67%) 24 (86%)
Respiratory disease (+) 12 (23%) 10 (17%) 4 (14%)
Healed TB disease(+) 2 3 1
      Malignant disease (+) 8 6 3
       Chronic  renal failure (+) 1 0 0
       Diabetes mellitus (+) 4 7 5
      HIV (+) 1 0 0
Laboratory finding (median ± S.D.)
      Lymphocyte (/µl) 1084 ± 743 1435 ± 651 1525 ± 594
      Total protein (g/dl) 6.8 ± 0.8 7.3 ± 0.5 7.1 ± 0.5
      Albumin (g/dl) 3.3 ± 0.8 4.0 ± 0.5 3.8 ± 0.5
Table 1: Clinical characteristics of the three disease groups.