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

Table 3 Incidence of colorectal cancer and relative risk by lifestyle factor in a Taiwan community-based cancer screening cohort among women (1991-2001)

Characteristic	Cases number	Rate1	RR2	95% CI3	P
BMI (kg/m2)
< 24.2	12	19.3	1.00
24.2-26.4	12	50.3	2.61	1.17-5.80	0.02
26.4-28.6	10	70.2	3.64	1.57-8.43	< 0.01
28.6 +	5	42.4	2.19	0.77-6.23	0.14
P for trend			0.012
Cholesterol (tertile4)
1	8	21.6	1.00
2	10	26.4	1.22	0.48-3.10	0.67
3	21	56.8	2.64	1.17-5.95	0.02
P for trend			0.012
Triglyceride (tertile5)
1	8	21.4	1.00
2	13	34.2	1.60	0.66-3.86	0.30
3	18	49.2	2.30	1.00-5.28	0.05
P for trend			0.046
Oral contraceptives
Never use	27	38.2	1.00
Ever use	7	21.7	0.57	0.25-1.31	0.19
Unknown	5	54.9
Intrauterine devices
Never use	15	35.8	1.00
Ever use	19	31.2	0.87	0.44-1.72	0.69
Unknown	5	54.5
Menopause
No	10	14.9	1.00
Yes	24	67.6	4.53	2.17-9.47	< 0.01
Unknown	5	53.5

¹Incidence rate per 10⁵ persons/year;

²Relative risk;

³95% Confidence interval;

⁴The tertile of cholesterol level (mg/dL) was < 165, 165-199, 199 +;

⁵The tertile of triglyceride level (mg/dL) was < 75, 75-126, 126 +.