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. 2009 Jan;24 Suppl(Suppl 1):S129-34.
doi: 10.3346/jkms.2009.24.S1.S129. Epub 2009 Jan 28.

Minimal proteinuria one year after transplant is a risk factor for graft survival in kidney transplantation

Na Ree Kang  1 , Jung Eun Lee, Wooseong Huh, Sung Joo Kim, Yoon-Goo Kim, Dae Joong Kim, Ha Young Oh
Affiliations

Minimal proteinuria one year after transplant is a risk factor for graft survival in kidney transplantation

Na Ree Kang et al. J Korean Med Sci. 2009 Jan.

Abstract

It is generally accepted that one-year post-transplant proteinuria over 0.5 gm per day has a negative impact on renal graft survival. In this study, the effects of minimal proteinuria less than 0.5 g/day were analyzed in 272 renal recipients who had survived for one year with a functioning graft. Recipients were classified by one-year post-transplant proteinuria: no proteinuria group (<0.2 g/day), minimal proteinuria group (0.2-0.5 g/day), and overt proteinuria group (>or=0.5 g/day). Recipients were followed up for 87.1+/-21 months after transplantation and 38 (13.9%) lost their graft during follow-up. Fifteen percent of patients had minimal proteinuria and 7.8% had overt proteinuria. Five-year graft survival in the minimal proteinuria group was 83.0%, and that in the overt proteinuria group was 70%, in contrast to 97.1% in the no proteinuria group (p=0.01 for trend). In a multivariate analysis, the minimal proteinuria group (relative risk [RR], 4.90; 95% confidence interval [CI], 2.09-11.46) and the overt proteinuria group (RR, 8.75; 95% CI, 3.29-23.29) had higher risks of graft failure than the no proteinuria group. Even minimal proteinuria at one year after transplantation was strongly associated with poor graft outcome. Therefore, it appears logical to consider a low level of proteinuria as a risk factor for graft survival in renal recipients.

Keywords: Graft Survival; Kidney Transplantation; Proteinuria.

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Figures

Fig. 1
Fig. 1
Effect of one-year post-transplant proteinuria on long-term graft survival. The minimal proteinuria group showed poor graft survival than the no proteinuria group. Log-rank test: p<0.01.
See this image and copyright information in PMC

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