Effectiveness and safety of splenectomy for gastric carcinoma: A meta-analysis

Table 3 Outcomes of a meta-analysis of overall survival rates, safety, operation-related events and overall survival rates stratified by location of tumor

	No. of studies	Splenectomy (n1/N)	Splenic preservation (n1/N)	RR/WMD (95% CI)	P-value for effect size	P-value for heterogeneity	Effect model
Overall survival rate stratified by different length of follow-up
	3	122/231	105/235	1.17 (0.97, 1.41)	0.1	0.85	Fixed
Postoperative morbidity and mortality
Morbidity	1	16/104	9/103	1.76 (0.82, 3.80)	0.15	NA	Fixed
Mortality	2	6/194	4/200	1.58 (0.45, 5.50)	0.47	0.82	Fixed
Operation-related events
No. of harvested lymph nodes	1	1042	1032	0.00 (-6.06, 6.06)	1	NA	Fixed
Operation time (min)	1	902	972	10.00 (-14.37, 34.37)	0.42	NA	Fixed
Length of hospital stay (d)	1	902	972	3.20 (-1.60, 8.00)	0.19	NA	Fixed
Reoperation	1	10/90	9/97	1.20 (0.51, 2.81)	0.68	NA	Fixed
Overall survival rate stratified by location of tumor (proximal and whole stomach)
	2	93/190	84/197	1.14 (0.92, 1.41)	0.23	0.91	Fixed

¹Represents the patients alive;

²The summed number of patients in each group; RR: Relative risk; WMD: Weighted mean differences; CI: Confidence interval; NA: Not applicable.