Table II.

Comparison of baseline data among the four groups [n (%)].

Items	Group A (n=276)	Group B (n=204)	Group C (n=187)	Group D (n=234)	t	Ρ-value
Sex					0.930	0.818
Male	180 (65.22)	125 (61.27)	125 (66.84)	149 (63.68)
Female	96 (34.78)	79 (38.73)	62 (33.16)	85 (36.32)
Age (years)					7.676	0.053
<58	121 (43.84)	115 (56.38)	90 (48.13)	110 (47.01)
≥58	155 (56.16)	89 (43.63)	97 (51.87)	124 (52.99)
Smoking					0.295	0.961
Yes	98 (35.51)	68 (33.33)	63 (33.69)	80 (34.19)
No	178 (64.49)	136 (66.67)	124 (66.31)	154 (65.81)