Association of Helicobacter pylori infection with colorectal polyps and malignancy in China

Table 1 Baseline characteristics of the participants, n (%)

Parameter	Control group (n = 2362)	Colorectal polyps group (n = 3872)	CRC group (n = 304)	F / χ2	P value
Age, mean ± SD (yr)	45.81 ± 13.44	53.01 ± 12.60	61.26 ± 12.94	320.48	< 0.001
Male/female	1355/1007	2189/1683	167/137	0.85	0.66
BMI, mean ± SD (kg/m²)	24.78 ± 3.83	24.85 ± 3.82	25.34 ± 3.66	2.87	0.06
Smoking	677 (28.66)	1048 (27.07)	94 (30.92)	1.89	0.39
Drinking	271 (11.47)	501 (12.94)	41 (13.49)	2.52	0.28
Family history of CRC	124 (5.25)	243 (6.28)	23 (7.57)	3.73	0.16

BMI: Body mass index; CRC: Colorectal cancer.