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Kaplan-Meier curves for target limb major amputation at 12 months for diabetics (DM) and nondiabetics (non DM): (A) entire sample, (B) critical limb ischemia subgroup, and (C) claudicant subgroup. Seventeen observations were excluded due to missing date of target limb amputation. The standard error did not exceed 10% at 12 months for both groups. Probs, probability.
