Peanut consumption and reduced risk of colorectal cancer in women: A prospective study in Taiwan

Table 1 Incidence and relative risk of colorectal cancer by social demographic characteristics in a Taiwan community-based cancer screening cohort (1991-2001)

Characteristic	Subject number	Personyr	Colorectal cancer
			Case number	Rate1	RR2 (95% CI3)	P
Age (yr)
< 50	12 902	129 055	18	13.9	1.00
50-59	6 679	66 812	51	76.3	5.47(3.20-9.36)	< 0.01
+     60	2 534	24 944	38	152.0	11.0 (6.30-19.4)	< 0.01
Gender
Women	11 192	112 007	39	34.8	1.00
Men	10 923	108 805	68	62.5	1.81 (1.22-2.68)	< 0.01
Education (yr)
None	4 576	45 806	30	65.5	1.00
≤ 6	9 126	91 009	56	61.5	0.94(0.61-1.47)	0.79
> 6	8 383	83 698	21	25.1	0.39(0.22-0.67)	< 0.01
Unknown	30	300	0	—	—
Ethnic group
Fukien	14 938	149 709	73	48.8	1.01(0.67-1.52)	0.96
Others4	7 128	70 612	34	48.2	1.00
Unknown	49	491	0	—	—
Residential area
Potzu	3 362	33 680	23	68.3	1.51(0.95-2.39)	0.08
Other5	18 753	187 132	84	44.9	1.00
Married
Yes	20 354	203 204	99	48.7	1.00
No	1 671	16 699	8	47.9	0.98(0.48-2.02)	0.97
Unknown	90	909	0	—	—
All	22 115	22 0812	107	48.5

¹Rate in 10⁵ persons/year;

²Relative risk;

³95% Confidence interval;

⁴Including mainland Chinese, Hskka and aborigines;

⁵Including Sanchi, Chutung, Kaoshu, Makung, Hushi and Paihsa.