A retrospective study: the prognostic value of anemia, smoking and drinking in esophageal squamous cell carcinoma with primary radiotherapy

Table 2 Cox univariate analysis for 2-year survival in 79 patients

	Univariate analysis
	2-year overall survival			2-year disease-free survival
	HR	95% CI	P	HR	95% CI	P
Hemoglobin (non-anemic vs anemic)	1.897	1.086-3.312	0.024	1.776	1.040-3.033	0.036
Smoking (no vs yes)	0.889	0.522-1.514	0.666	0.981	0.593-1.622	0.940
Drinking (no vs yes)	0.941	0.554-1.600	0.824	0.959	0.582-1.579	0.869
TNM stage (I vs II vs III vs IV)	1.652	1.175-2.322	0.004	1.650	1.193-2.281	0.002
Initial treatment (RT vs S + RT vs CRT vs S + CRT)	0.840	0.655-1.077	0.169	0.900	0.718-1.129	0.362
Tumor location (C vs U vs M vs L)	0.937	0.703-1.250	0.660	0.964	0.736-1.263	0.792

C, cervical; CI, confidence interval; CRT, chemoradiotherapy; HR, hazard ratio; L, low; M, middle; RT, radiotherapy; S, surgery; TNM, tumor, lymph node, metastasis; U, upper; vs, versus.

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