trend toward significanceP = 0.053
Other categorized variables such as invasion depth (χ 2 = 17.377, P < 0.001), histologic type (χ 2 = 7.715, P = 0.005) and LAUREN classification (χ 2 = 11.260, P = 0.005) were statistically significant, and the presence of ulcer presented a high trend toward significance (χ 2 = 3.741, P = 0.053).