Systemic inflammatory response index is a predictor of prognosis in gastric cancer patients: Retrospective cohort and meta-analysis

Table 2 Patient baseline characteristics and their correlations with systemic inflammatory response index level after robotic gastrectomy

Variables		SIRI ≤ 1.38 (n = 106)	SIRI > 1.38 (n = 55)	P value
Gender				0.0791
	Male	80	48
	Female	26	7
Age (yr)		60.80 (12)	63.71 (14)	0.0582
Underlying disease	No	91	37	0.0061
	Yes	15	18
BMI		22.36 (4.7)	22.19 (4.2)	0.7652
Tumor location	Upper third	12	7	0.9381
	Middle third	9	4
	Lower third	85	44
Tumor dimensions (cm)				0.0561
	< 3	32	9
	≥ 3	74	46
Differentiation				0.1661
	Moderate and poor	101	55
	Well	5	0
T stage				0.0151
	T1	17	4
	T2	11	0
	T3	53	31
	T4	25	20
N stage				0.3381
	N0	40	13
	N1	19	11
	N2	13	9
	N3	34	22
TNM stage				0.0861
	I	22	4
	II	31	18
	III	53	33
Operation				0.4471
	Subtotal gastrectomy	51	23
	Total gastrectomy	55	32
Operation time (minutes)
ASA				0.7961
	I-II	95	50
	III-IV	11	5
Perioperative transfusion				0.141
	No	86	39
	Yes	20	16
CA199 (ng/mL)				0.0771
	Negative	91	41
	Positive	15	14
CEA (ng/mL)				0.0031
	Negative	88	34
	Positive	18	21
Blood loss (mL)				0.0531
	< 200	79	31
	200 ≤ X ≤ 400	24	20
	> 400	3	4
Postoperative complication				0.0011
	No	99	41
	Yes	7	14
Postoperative chemotherapy				0.9251
	No	32	17
	Yes	74	38
P53				0.7621
	Wild	36	20
	Mutant	70	35
Ki-67				0.7721
	0%-49%	7	5
	50%-74%	34	19
	75%-100%	65	31
Her-2				0.7741
	Negative	99	52
	Positive	7	3
Lymph node metastasis rate (%)				0.0231
	0.00%	42	12
	> 0.00%	64	43
Enteral nutrition time				0.3181
	≤ 7 d	73	42
	> 7 d	33	13
Duration of surgery (minutes)		267.3 (90)	269.7 (60)	0.8012
Length of hospitalization (days)		17.89 (5)	18.04 (6)	0.8762

¹χ² test.

²Mann-Whitney U test with median (interquartile range).

The bold numbers in the tables are P values with statistical significance (< 0.05). SIRI: Systemic inflammation response index; BMI: Body mass index; ASA: American society of anesthesiology; CA199: Carbohydrate antigen 199; CEA: Carcinoembryonic antigen; TNM: Tumor-node-metastasis.