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Arch Surg. 2001;136:474.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

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.

I would like to provide a further possible explanation for complications and graft survival not highlighted in their article. The weight of the patient and the donor-recipient body weight ratio were not mentioned. This simple biological and easily performed measure was closely associated with 5-year graft survival.³ In patients with a donor-recipient weight differential less than 1 and using echo color Doppler ultrasonography, patients with reduced nephrogenic mass had a negative relationship between renal blood flow and transplant duration.⁴

The value of this finding was exhibited recently . . . [Full Text of this Article]