Oxidative imbalance increases the risk for colonic polyp and colorectal cancer development

Table 1 Patients’ main characteristics

	Αdenocarcinoma, n = 56	Colon polyps, n = 33	Controls, n = 81
Age in yr, n (%)
50-59	1 (1.8)	8 (24.2)	9 (11.1)
60-69	20 (35.7)	12 (36.4)	44 (54.3)
70-79	28 (50.0)	11 (33.3)	16 (19.8)
80-94	7 (12.5)	2 (6.1)	12 (14.8)
Sex
Men	35 (62.5)	21 (63.6)	44 (54.3)
Women	21 (37.5)	12 (36.4)	37 (45.7)
Smoking
Yes	50 (89.3)	17 (51.5)	68 (84.0)
No	6 (10.7)	16 (48.5)	13 (16.0)
Number of cigarettes/d
< 20	4 ± 8.0	3 ± 17.6	0 ± 0.0
20	10 ± 20.0	6 ± 35.3	20 ± 29.4
> 20	36 ± 72.0	8 ± 47.1	48 ± 70.6
Smoking duration in yr (mean ± SD)	37.7 ± 10.0	33.5 ± 9.1	40.3 ± 6.2

Values are presented as n (%) or mean ± SD.