Fig. 5From: Perioperative liberal versus restrictive fluid strategies and postoperative outcomes: a systematic review and metanalysis on randomised-controlled trials in major abdominal elective surgeryLiberal / restrictive classification of the subgroups of patients in the included studies. Data are reported according to the tertiles of overall fluid amount (in ml) reported in the days 0 (day of the operation) and 1 (first postoperative day)Back to article page