超低位直肠癌保肛手术术后患者生存分析及预后影响因素分析

表2 自变量赋值

自变量	赋值
距肛缘距离	≤5 cm = 2, ＞5 cm = 1
CA125	＜55.27 U/mL = 1, ≥55.27 U/mL = 2
CEA	＜66.71 ng/mL = 1, ≥66.71 ng/mL = 2
HIF-1α	＜70.02 ng/mL = 1, ≥70.02 ng/mL = 2
miR-192	＜1.49 = 2, ≥1.49 = 1
PNAG评分	＜2 = 2, ≥2 = 1
术后尿管留置时间	＜4 d = 1, ≥4 = 2

CA125: 血清糖类抗原125; CEA: 癌胚抗原; HIF-1α: 缺氧诱导因子1α; miR-192: 微小RNA-192; PNAG: 营养预后指数和白球比.