Table 6. Comparison of OS between normal CYFRA21-1 (< 3.3 ng/mL) and high CYFRA21-1 level (≥ 3.3 ng/mL) groups by log-rank test*.

Group	n	Death	Censored in the first 2 years (%)	Censored between the 3rd and 5th year (%)	MST (95%CI)	2-year rate, %	5-year rate, %
High	63	50	3 (4.76)	2 (5.56)	43 (20.778, 65.222)	60.0	14.1
Normal	106	57	2 (1.89)	8 (10.67)	56 (50.530, 61.470)	68.3	43.8

*log-rank, χ²=14.700, P<0.0001.