Table 1.

Pre-visit symptoms

Variables	Group A n = 2033 N(%)	Group B n = 2612 N(%)	P value
CLINICAL SYMPTOMS AND SIGNS BEFORE DIAGNOSIS			P < 0.05
Routine check-up	954 (46.9)	1505 (57.6)
Cough or expectoration or hemoptysis	404 (19.9)	452 (17.3)
Chest tightness or chest pain	276 (13.6)	240 (9.2)
Dyspnea	26 (1.3)	21 (0.8)
Hoarseness	10 (0.5)	0 (0)
Other symptoms	191 (9.4)	170 (6.5)
Found occasionally	172 (8.4)	224 (8.6)