The Efficacy of Long-Term Chinese Herbal Medicine Use on Lung Cancer Survival Time: A Retrospective Two-Center Cohort Study with Propensity Score Matching

Table 2

Comparison of progression-free survival of two groups after PSM [case (%)].

Group	Cumulative recurrence/survival rate (%)
	1-year	2-year	3-year	4-year	5-year	6-year	7-year	8-year	9-year	10-year
Control	61/70.56	105/49.18	121/41.01	129/36.54	139/30.72	146/25.58	150/21.23	152/18.65	152/18.65	152/18.65
CHM	27/86.88	54/73.17	72/63.15	79/58.63	86/53.06	91/48.12	93/45.32	95/41.62	95/41.62	96/39.02
χ^2	16.661	26.479	23.207	24.039	27.191	29.663	32.151	32.379	32.379	31.312
value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001

, a significantly statistical difference between two groups.