CEACAM5 and cancer: Moreover, Cox proportional hazards regression analysis indicated that patients with serum albumin levels < 3.5 gm/dl were 1.45 times more likely to die of cancer than those whose serum albumin levels ≥3.5 gm/dl (P = 0.011; HR, 1.25; 95% CI, 1.09–1.92); patients with UICC stage III/IV were 3.25 times more likely to die of cancer than those with UICC stage I/II (P < 0.001; HR, 3.25; 95% CI, 2.42–4.36); patients with serum CEA ≥5 ng/ml were 2.38 times more likely to die of cancer than those whose serum CEA <5 ng/ml (P < 0.001; HR, 2.38; 95% CI, 1.77–3.20) for cancer-specific survival.