Table 1.

Baseline characteristics for patients with SIRI ≤ 0.68 versus SIRI > 0.68 before and after propensity matching.

Clinical parameter	Unmatched (complete) dataset				Matched (1 : 1) dataset
	SIRI ≤ 0.68 (116)	SIRI > 0.68 (186)	χ 2	P	SD	SIRI ≤ 0.68 (104)	SIRI > 0.68 (104)	χ 2	P	SD
Sex			14.60	<0.001∗				0.12	0.734
Male	81	163			0.08	81	83			0.09
Female	35	23			0.08	23	21			0.09
Age			1.89	0.169				0.02	0.887
≤60	51	67				42	41
>60	65	119				62	63
Grade			8.33	0.016∗				2.06	0.356
Well	11	4				9	4
Moderately	77	129				70	73
Poorly	28	53				25	27
Tumour size			6.67	0.010∗				0.92	0.337
≤5 cm	90	118			0.70	81	75			0.08
>5 cm	26	68			0.70	23	29			0.08
T stage			9.23	0.026∗				3.35	0.340
Tis-T1	24	19			0.36	22	19			0.07
T2	16	17			0.10	14	11			0.01
T3	47	89			0.08	43	37			0.10
T4	29	61			0.15	25	37			0.15
N stage			10.21	0.017∗				3.61	0.306
N0	58	64			0.28	55	42			0.03
N1	22	42			0.10	18	26			0.12
N2	23	37			0.08	18	20			0.02
N3	13	43			0.01	13	16			0.16
AJCC stage			11.24	0.004∗				1.06	0.588
I	36	31			0.29	33	27			0
II	38	56			0.09	35	35			0
III	42	99			0.05	36	42			0
Vascular invasion			7.86	0.005∗				0.74	0.390
No	111	159			0.20	99	96			0.09
Yes	5	27			0.12	5	8			0.11

SD: standard deviation; AJCC: American Joint Committee on Cancer; SIRI: systemic inflammation response index.