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Association between the ratio of the two alkylresorcinol homologs C17:0 and C21:0 and distal colon cancer. Model adjusted for plasma total alkylresorcinol concentration and conditioned on matching factors. In human plasma alkylresorcinol, the C17:0/C21:0 ratio is typically 0.1 to 0.2 when the diet is dominated by whole-grain wheat and 0.6 to 0.8 when the diet is dominated by whole-grain rye. IRR = incidence rate ratio.
