Risk factors for mortality:
(1) older age
(2) contaminated or infected wounds
Risk factors for major complications:
(1) older age
(2) myocardial infarction and/or congestive heart failure
(3) preoperative neurologic issue
(4) history of prior wound infection
(5) corticosteroid therapy
(6) history of sepsis
(7) ASA >=3
(8) prolonged operative time
Risk factors for minor complications:
(1) female sex
(2) corticosteroid therapy
(3) history of sepsis
(4) ASA >= 3
(5) prolonged operative time
Additional risk factors (from univariate analysis):
(1) serum albumin < 3 g/dL
(2) COPD
(3) renal insufficiency
(4) peripheral vascular disease
(5) diabetes
