Table 5.

Survival analysis of patients with esophageal squamous cell carcinoma in Group A according to cyclooxygenase-2 protein expression levels.

	Cyclooxygenase-2 protein expression			P-value
	Negative	Low	High
1-year survival rate (%)	96.3	88.6	87.5	0.02
3-year survival rate (%)	77.1	41.4	33.3
5-year survival rate (%)	52.2	41.4	16.7
Median survival time (months)	65	30	35
1-year recurrence rate (%)	50.0	90.0	50.0	0.56
3-year recurrence rate (%)	16.7	10.0	0.0
5-year recurrence rate (%)	0.0	0.0	--
Median recurrence time (months)	9	21	12