Table 4.

Multivariate Cox analysis of the ARS for re-RT

Variable	p Value	RR (95% CI)
Failure patterns	0.997	–
Initial treatment	0.287	–
RFI time	0.042	0.743 (0.559–0.989)
Chemotherapy	0.001	0.580 (0.420–0.802)
Salvage radiation dose	0.379	–
Esophageal stenosis	0.045	1.319 (1.007–1.729)
Fat space between tumor and adjacent tissue disappeared	0.158	–
Hb level	0.155	–

RR relative risk, CI confidence interval