We read with interest the article by Lee et al.1 The data reconfirm that preservation time is an independent prognostic factor for 5-year kidney graft survival.2 The comments in the discussion already cited the lack of donor and recipient ages, comorbidities, level of anti-HLA antibodies, and retransplantation status as potential confounding factors that this article did not address for the respective HLA mismatches.
Shuhaiber JH. Weight as a Potential Confounding Factor for 5-Year Kidney Graft Survival. Arch Surg. 2001;136(4):474. doi: