Table 2.

Demographic data from the 95 subjects, including the glottic cancer patients.

Clinical Variables		Normal Male (n = 45)	Larynx Cancer (n = 50)	p-Value *
Age (year)		49.7 ± 2.1 (24~83)	65.5 ± 1.3 (50~88)	<0.001
Smoking (yes)		12 (26.7)	37 (74.0)	<0.001 †
Smoking amount (packs per year)	<30	7 (58.3)	8 (21.6)
	≥30	5 (41.7)	29 (78.4)	<0.001 ‡

Values are presented in mean ± standard deviation (min~max) or number (%). * Group comparison between normal cases versus laryngeal cancer patients. ^† Hazards ratio: 14.8. ^‡ Hazards ratio: 11.6.