“…The authors indicated increased virulence of aortic disease, smaller aortic size, and more progressive infrainguinal disease as the responsible factors. Unlike its negative effect on surgery, younger age has not been found to be a significant risk factor for iliac artery stent placement in the study of Siskin et al 19 These authors reported that at 1, 2, and 3 years, the primary patency rates were 86%, 72%, and 65%, and the secondary patency rates were 90%, 88%, and 88%, respectively; these figures were found comparable to those reported for older patients. In contrast to the results of Siskin et al, 19 in our study, primary and secondary patency rates at 1 to 5 years were 64% to 32% and 86% to 43%, respectively, for kissing-stent patients who were Ͻ50 years of age; these figures were significantly lower than those for patients who were Ͼ50 (log rank 0.002 and 0.003, respectively).…”