Long-term efficacy of perioperative chemoradiotherapy on esophageal squamous cell carcinoma

Table 1 Characteristics of the preoperative patients (n = 238)

	Pre-CRT (n = 80)	Post-CRT (n = 78)	S (n = 80)	Statistics
				χ2	P
Sex (M:F)	52:28	48:30	50:30	3.1326	0.209
Age (yr)				1.2375	0.975
40-	12	13	11
50-	24	25	24
60-	28	29	30
70-	16	11	15
Location				0.1920	0.996
Upper	11	10	12
Middle	45	45	44
Lower	24	23	24
CT staging				0.1165	0.943
II	35	33	36
III	45	45	44

Pre-CRT: Preoperative chemoradiotherapy; Post-CRT: Postoperative CRT; S: Surgery alone; CT: Computed tomography.