Table 4.

Survival time of patients in different groups.

Subject	Time (months)	95% CI		P
		Upper limit	Lower limit
cfDNA high expression	29.99 ± 0.78	28.46	31.54	0.031
cfDNA low expression	27.66 ± 1.05	25.60	29.72
Total	28.92 ± 0.71	27.53	30.31