Table 5. Comparison of DFS between normal CEA (< 4.7 ng/mL) and high CEA level (≥ 4.7 ng/mL) groups by log-rank test*.

Group	Events†	Censored in the first 2 years (%)	Censored between the 3rd and 5th year (%)	Median DFS (95%CI)	2-year rate, %	5-year rate, %
High	61	2 (2.82)	3 (8.33)	34.00 (20.234, 47.766)	41.2	14.3
Normal	57	3 (3.06)	7 (9.33)	53.00 (51.751, 54.249)	63.5	47.9

*log-rank, χ²=26.211, P<0.0001. ^†The number of patients who were found regional or distant recurrence.