Comparison between Intensity-Modulated Radiotherapy and Three-Dimensional Conformal Radiotherapy for Their Effectiveness in Esophageal Cancer Treatment: A Retrospective Single Institution Study

Table 3

Univariate analysis of prognostic factors for EC patients’ overall survival.

Factors	Wald chi-square	HR	value
Gender	0.097	1.107	0.751
Age	0.119	1.003	0.730
Type of medical insurance	1.483	1.120	0.218
Smoking status	0.043	1.040	0.835
Smoking intensity	0.002	0.995	0.965
Smoking duration	0.104	0.949	0.746
Quit smoking	0.256	0.890	0.608
Drinking status	0.740	1.145	0.387
Alcohol consumption	0.694	0.936	0.407
Drinking duration	0.193	1.073	0.660
Quit drinking	7.323	0.422	0.002
Weight loss	0.338	0.967	0.559
Pathology	0.334	0.964	0.556
Chemotherapy	10.584	0.610	0.001
Concurrent chemotherapy	3.776	0.836	0.044
Radiation therapy techniques	3.740	1.339	0.052
Radiation dose	1.684	0.819	0.198
Previous treatment	0.129	0.947	0.719
Previous treatment methods	0.000	0.999	0.991

EC, esophageal cancer.