Table 3.

Combined data about operation related risk factors.

	Number of articles	OR	95% CI	P	I2(%)	P H
Pancreas texture	14	1.80	1.08–3.02	0.030	51	0.010
Types of stump closure	8	0.75	0.42–1.33	0.330	53	0.040
Blood transfusion	10	1.55	1.11–2.16	0.009	0	0.640
Intraoperative blood loss	8	2.25	1.54–3.29	<0.0001	28	0.210
Operative time	7	1.67	1.08–2.58	0.020	31	0.190
Splenectomy	12	0.91	0.52–1.59	0.730	52	0.020
Multiorgan resection	8	0.77	0.54–1.10	0.150	28	0.210
Main duct ligation	7	0.50	0.24–1.08	0.080	61	0.020
PGA felt wrapping	3	0.75	0.18–3.14	0.690	61	0.080
Extended lymphadenectomy	4	0.82	0.56–1.20	0.300	0	0.820