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Table 3: Postoperative complication and mortality rates by low, medium, and low volume years as defined by the number of non-head resections performed.*

Low volume years Medium volume years High volume years Non-head resections (n  =  42) Head resections (n  =  93) Non-head resections (n  =  57) Head resections (n  =  64) Non-head resections (n  =  106) Head resections (n  =  149) Total (n  =  511) Death 1 (2.1%) 3 (3.2%) 1 (1.8%) 1 (1.6%) 2 (1.9%) 3 (2%) 11 (2.2%) Wound infection 2 (4.8%) 14 (15.1%) 1 (1.8%) 10 (15.6%) 6 (5.7%) 13 (8.7%) 46 (9%) Pancreatic fistula 1 (2.4%) 9 (9.7%) 1 (1.8%) 9 (14.1%) 6 (5.7%) 14 (9.4%) 40 (7.8%) Gastroparesis 1 (2.4%) 6 (6.5%) 1 (1.8%) 9 (14.1%) 1 (0.9%) 16 (10.7%) 34 (6.7%) Intraabdominal abscess 1 (2.4%) 14 (15.1%) 4 (7%) 10 (15.6%) 6 (5.7%) 18 (12.1%) 53 (10.4%) Bile leak 0 (0%) 2 (2.2%) 0 (0%) 1 (1.6%) 0 (0%) 2 (1.3%) 5 (1%) Pneumonia 1 (2.4%) 7 (7.5%) 1 (1.8%) 3 (4.7%) 2 (1.9%) 5 (3.4%) 19 (3.7%) Urinary tract infection 0 (0%) 6 (6.5%) 3 (5.3%) 2 (3.1%) 5 (4.7%) 9 (6%) 25 (4.9%) Postoperative bleeding 0 (0%) 6 (96.5%) 1 (1.8%) 0 (0%) 2 (1.9%) 3 (2%) 12 (2.3%) Reoperation 3 (7.1%) 7 (97.5%) 3 (5.3%) 6 (9.4%) 2 (1.9%) 10 (6.7%) 31 (6.1%) Other 7 (16.7%) 38 (40.9%) 9 (15.8%) 22 (34.4%) 15 (14.2%) 53 (35.6%) 144 (28.2%)

*Each study year was listed by number of resections performed. The years were then divided by volume into three roughly equally sized groups: high, medium, and low.