Table 2.

Changes in plasma free DNA levels before and after NSCLC treatment.

Group	Surgery group (n = 50)	Chemotherapy group (n = 66)
		Responders (n = 39)	Non-responders (n = 27)
Before treatment	190.73 ± 79.36 ng/mL	207.68 ± 93.79 ng/mL	209.74 ± 97.90 ng/mL
After treatment	98.46 ± 45.66 ng/mL	106.47 ± 58.88 ng/mL	188.75 ± 76.69
t	1.9845	1.9917	2.0066
p	<0.001	<0.001	0.25

Comparison between responders and non-responders after chemotherapy, t = 1.9977, p < 0.001. NSCLC, non-small cell lung cancer.