title: Gender-based analysis of perioperative outcomes associated with lower extremity bypass.
abstract: We analyzed gender-based differences in preoperative factors, procedural characteristics, and 30-day outcomes after lower extremity bypass (LEB). LEB procedures were identified from the American College of Surgeons National Surgical Quality Improvement Program Participant User File.  Groupwise comparisons of preoperative and procedural variables were made using chi square, t tests, and nonparametric methods; gender influences on mortality, systemic, and surgical site complications were evaluated using logistic regression. Women (4,107 of 11,011 [37.3%]) were older  and had greater prevalence of hypertension, diabetes, chronic obstructive pulmonary disease, rest pain, dialysis, previous stroke, open/infected wound, and dependent functional status (P < 0.01 for all comparisons). Women more commonly underwent emergent and extra-anatomic procedures  but had lower rates of venous conduit or tibial level outflow use. Univariable associations between female gender and risk of 30-day mortality, systemic, and surgical site complications were identified; only the association with surgical site complications remained significant in multivariable  modeling (OR, 1.8; 95% CI, 1.6 to 2.1; P < 0.0001). Gender-based differences in demographic, comorbidity, and procedural factors may contribute to disparities in perioperative outcomes associated with LEB. Female gender may be associated with increased risk for surgical site complications,  but 30-day mortality and systemic complication rates in women may reflect effects of confounding factors rather than gender-specific influence.
authors.affiliation: Department of Surgery, Division of Vascular Surgery and Endovascular Therapy, Emory University School of Medicine, Atlanta, Georgia, USA.
authors.forename: Ashish K
authors.initials: AK
authors.lastname: Jain
authors.forename: Gabriela
authors.initials: G
authors.lastname: Velazquez-Ramirez
authors.forename: Philip P
authors.initials: PP
authors.lastname: Goodney
authors.forename: Matthew S
authors.initials: MS
authors.lastname: Edwards
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Corriere
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D035002:Lower Extremity / Q000098:blood supply*; D008297:Male; D058729:Peripheral Arterial Disease / Q000601:surgery*; D012737:Sex Factors; D016896:Treatment Outcome; D014656:Vascular Surgical Procedures / Q000379:methods