Dietary cadmium intake and risk of prostate cancer: a Danish prospective cohort study

BMC Cancer

Table 3 Association between dietary cadmium intake and total prostate cancer by different baseline characteristics

Stratification factors	N cases	Crude model	p ^a	Adjusted model^b	p ^a
		IRR (95% CI)		IRR (95% CI)
Education
Low (<8y)	540	0.96 (0.80-1.15)		0.95 (0.79-1.14)
Medium (8-10y)	633	1.01 (0.85-1.20)	0.88	1.00 (0.84-1.19)	0.90
High (>10y)	394	1.03 (0.84-1.26)		1.01 (0.82-1.24)
Smoking
Never	428	0.99 (0.81-1.21)		0.97 (0.79-1.18)
Former	580	1.15 (0.97-1.37)	0.08	1.13 (0.95-1.35)	0.09
Current	561	0.87 (0.72-1.04)		0.86 (0.71-1.03)
BMI
<25	1000	0.93 (0.78-1.11)	0.33	0.92 (0.77-1.09)	0.29
≥25	567	1.04 (0.91-1.19)		1.03 (0.90-1.18)
Total zinc intake
< median	798	1.04 (0.86-1.24)	0.89	1.00 (0.84-1.21)	0.99
≥ median	769	1.02 (0.88-1.18)		1.00 (0.86-1.16)
Total iron intake
< median	798	1.08 (0.89-1.32)	0.59	1.05 (0.86-1.29)	0.67
≥ median	769	1.01 (0.87-1.17)		1.00 (0.86-1.16)

Abbreviations:IRR incidence rate ratio, CI confidence interval, BMI body mass index.
^aP values for interaction.
^bAdjusted for educational level (<8 y; 8-10y; >10y), smoking status (never; former; current), BMI (continuous), waist-to-hip ratio (continuous) and physical activity (MET score, continuous). BMI (continuous) was not including in the stratification analyses on BMI.
The stratification factors are education, smoking, BMI, zinc intake and iron intake. Incidence rate ratios are per 10 μg increment day⁻¹.

ISSN: 1471-2407