Despite higher Society of Thoracic Surgeons mortality risk scores ( 11.9 vs. 11.6 ; p = 0.05 ) , female patients had lower prevalence of coronary artery disease ( 64.4 % vs. 83.7 % ) , prior coronary artery bypass graft surgery ( 19.8 % vs. 61.2 % ) , peripheral vascular disease ( 36.4 % vs. 46.9 % ) , diabetes mellitus ( 35.6 % vs. 45.6 % ) , and elevated creatinine ( 11.7 % vs. 23.9 % ) .