Table 3.

Final Diagnosis of Study Population.

Diagnosis	Age ≥ 80 (n = 45)	Age < 80 (n = 183)
Lung cancer	37 (82.2%)	147 (80.3%)
Adenocarcinoma	25 (55.6%)	84 (45.9%)
Squamous cell carcinoma	8 (17.8%)	36 (19.7%)
NSCLC, NOS	4 (8.9%)	21 (11.5%)
Small cell carcinoma	0 (0%)	5 (2.7%)
Metastasis	1 (2.2%)	8 (4.4%)
Other malignancy	1 (2.2%)	6 (3.3%)
Benign	6 (13.3%)	23 (12.6%)
Tuberculosis	3 (6.7%)	10 (5.5%)
Pneumonia or others	3 (6.7%)	13 (7.1%)

NSCLC, non-small-cell lung cancer; NOS, not otherwise specified.