Table 4.

Five-year cumulative overall survival (stratified by AJCC pTNM stage, 8th edition) in laparoscopic and open groups.

	N of Patients		Five-Year Survival Rate		p-Value *
	Laparoscopy	Open	Laparoscopy %	Open %
Entire cohort
All patients	1812	1221	81.1	66.4	<0.0001
Stage IA	358	199	97.4	93.5	0.029
Stage IB	156	130	94.2	75	<0.0001
Stage IIA	191	161	90.4	70.3	<0.0001
Stage IIB	213	144	88.5	79	0.002
Stage IIIA	309	231	78.5	56.6	<0.0001
Stage IIIB	352	195	69	51	<0.0001
Stage IIIC	233	161	60.1	48.5	0.001
Matched cohort
All patients	624	624	77.4	75.2	0.202
Stage I	150	134	96.4	94	0.432
Stage IA	101	91	95	98	0.189
Stage IB	49	43	100	82	0.011
Stage II	140	137	86.7	83.8	0.469
Stage IIA	67	69	87	77.2	0.146
Stage IIB	73	68	86.6	91	0.509
Stage III	334	353	67.8	65	0.264
Stage IIIA	112	117	74.8	74.6	0.679
Stage IIIB	120	117	69	63.7	0.406
Stage IIIC	102	119	59.5	58.2	0.621

* Log-rank test.