Outcomes of concurrent chemoradiotherapy versus chemotherapy alone for stage IV esophageal squamous cell carcinoma: a retrospective controlled study

Table 4 Multivariate Cox regression analyses for OS

Factor	P	HR (95% CI)
Treatment modality (CCRT vs chemotherapy)	0.013	0.631 (0.438–0.907)
Number of metastases organs (Solitary vs Multiple metastasis)	0.037	0.668 (0.457–0.976)
T-Stage (T1 + 2 vs T3 + 4)	0.113	0.679 (0.421–1.096)
Chemotherapy regimens (PTX + DDP vs 5-Fu + DDP)	0.089	0.732 (0.511–1.049)

Abbreviations: CCRT concurrent chemoradiotherapy, HR hazard ratio, CI confidence interval, OS overall survival

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