MUC5AC and colonic neoplasm: However, the elevated MUC2 expression (positive vs. negative: OR = 1.64, 95% CI = 1.01–2.67, P = 0.04) and MUC5AC expression (positive vs. negative: OR = 1.97, 95% CI = 1.48–2.62, P < 0.00001) were associated with colon cancer.