A comparison of tibial artery bypass performed with heparin-bonded expanded polytetrafluoroethylene and great saphenous vein to treat critical limb ischemia 

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A comparison of tibial artery bypass performed with heparin-bonded expanded polytetrafluoroethylene and great saphenous vein to treat critical limb ischemia  Richard F. Neville, MD, Avery Capone, BS, Richard Amdur, PhD, Michael Lidsky, MD, Joseph Babrowicz, MD, Anton N. Sidawy, MD, MPH  Journal of Vascular Surgery  Volume 56, Issue 4, Pages 1008-1014 (October 2012) DOI: 10.1016/j.jvs.2012.03.020 Copyright © 2012 Society for Vascular Surgery Terms and Conditions

Fig 1 Kaplan-Meier survival curves with log-rank analysis show primary patency over 12 months by graft type. The error bars show the 95% confidence interval. Survival functions for patency between graft types did not differ significantly. DF, Degrees of freedom; HePTFE, heparin-bonded expanded polytetrafluroethylene; Pr, probability. Total Failed Censored Censored Occluded HePTFE 62 11 51 82.26 17.74 Vein 50 7 43 86.00 14.00 Total 112 18 94 83.93 16.07 Test of equality over strata Test χ2 DF Pr >χ2 Log-rank 0.2231 1 0.6367 Journal of Vascular Surgery 2012 56, 1008-1014DOI: (10.1016/j.jvs.2012.03.020) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

Fig 2 Kaplan-Meier survival curves with log-rank analysis show amputation over 12 months by graft type. The error bars show the 95% confidence interval. Amputation risk did not differ significantly between graft types. DF, Degrees of freedom; HePTFE, heparin-bonded expanded polytetrafluroethylene; Pr, probability. Total Failed Censored Censored Amputation HePTFE 62 9 54 87.10 12.90 Vein 50 7 43 86.00 14.00 Total 112 16 97 86.61 14.30 Test of equality over strata Test χ2 DF Pr >χ2 Log-rank 0.0067 1 0.9346 Journal of Vascular Surgery 2012 56, 1008-1014DOI: (10.1016/j.jvs.2012.03.020) Copyright © 2012 Society for Vascular Surgery Terms and Conditions