KRAS and rectal neoplasm: On the other hand, a high consumption of pork was inversely associated with wild-type K-ras colon and rectal tumours (RR for highest vs lowest quartile of consumption 0.72, 95% CI 0.51–1.02; Ptrend 0.05 and 0.50, 95% CI 0.26–0.93; Ptrend 0.01, respectively).