Table 4.
Tertiles of dietary calcium intake level (mg/day) | Categories of serum 25-(OH)D (nmol/l) | ||
---|---|---|---|
1 (<50.0) | 2(≥50.0 to <75.0) | 3(≥75.0) | |
1 (<797.5) | 1.33 (1.14 to 1.54) | 1.11 (1.01 to 1.22) | 0.85 (0.69 to 1.02) |
2 (≥797.5 to <1113.5) | 1.17 (1.07 to 1.27) | 1.00 | 0.80 (0.69 to 0.90) |
3 (≥1113.5) | 0.95 (0.80 to 1.13) | 0.85 (0.73 to 0.98) | 0.72 (0.57 to 0.91) |
Data are incidence rate ratio (95% confidence interval) derived from the multivariate adjusted models described in the text based on a dose-response analysis with predefined categories of circulating 25-(OH)D and tertiles of dietary calcium intake. P value for statistical interaction of circulating 25-(OH)D with dietary calcium=0.154. For this analysis, the total number of colorectal cancer case-control sets is 1220 due to missing nutrient data from Greece.