TB group (n = 31)

NTM group (N = 42)

Other disease group (N = 20)

Age (median ± S.D.)

75.0 ± 21.4

69.5 ± 13.6*

74.0 ± 14.1

Sex (male: female)

17:14

16:26*

12:8

Smoking history (+)

18 (58%)

14 (33%)*

9 (45%)

Underlying disease (+)

24 (77%)

25 (60%)*

18 (90%)

Respiratory disease (+)

6 (19%)

7 (17%)

4 (20%)

Healed tuberculosis

2

4

1

COPD

1

1

2

Others

3

2

1

Non-respiratory disease (+)

18 (58%)

18 (43%)

14 (70%)

Malignant disease

4

4

2

Diabetes mellitus

2

3

3

Cardiovascular disease

4

3

3

Others

8

8

6

Immunosuppressive treatment

3 (10%)

4 (10%)

2 (10%)

Laboratory findings (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