Fig. 2

A Relative risk of complications in two group before propensity score matching; B Relative risk of complications in two group after propensity score matching; The impact of bilateral PVB on POPF and postoperative complications after pancreatic surgery. PVB: Paravertebral block; POPF: Postoperative pancreatic fistula; RR: Relative risk; CI: Confidence interval; CCE: Cardio-cerebrovascular events; PCs: Pulmonary complications; AKI: Acute kidney injury; DGE: Delayed gastric emptying; BL: Biochemical leak.