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Hypoalbuminaemia at time of surgery is associated with an increased risk for overall graft loss after kidney transplantation.
Nephrology 2018 August 28
AIM: The aim of this retrospective cohort study was to investigate whether pre-operative hypoalbuminaemia (<35 g/L) is associated with adverse outcomes post kidney transplantation.
METHODS: Our retrospective, single-centre analysis included all patients who received their kidney transplant between 2007 and 2017, with documented admission albumin levels prior to surgery. Survival analyses were undertaken to explore the relationship of pre-transplant hypoalbuminaemia versus other baseline variables upon post-transplant outcomes.
RESULTS: We analysed 1,131 kidney allograft recipients transplanted at our center (2007-2017), with median follow up 746 days (IQR 133-1,750 days). Kidney transplant recipients with pre-operative hypoalbuminaemia were more likely older, female, recipients of deceased-donor kidneys and to have longer cold ischaemic times. Recipients with pre-operative hypoalbuminaemia had longer hospital admissions post-operatively but no difference in delayed graft function rates. There was no difference in 1-year creatinine but recipients with hypoalbuminaemia had reduced risk for cellular rejection. We observed significantly worse patient survival (83.2% versus 90.7%, p<0.001) and overall graft survival (72.5% versus 82.0%, p<0.001) for recipients with hypoalbuminaemia versus normal albumin levels respectively but no difference in death-censored graft survival. In a Cox regression model, adjusted for baseline pre-operative variables, hypoalbuminaemia was independently associated with an increased risk for overall graft loss after kidney transplantation (hazard ratio 1.468, 95% CI 1.087-1.982, p=0.012).
CONCLUSIONS: Pre-operative hypoalbuminaemia is an independent risk factor for overall graft loss after kidney transplantation. Further work is warranted to investigate the underlying pathophysiology to determine what supportive measures can be undertaken to attenuate adverse post-transplant outcomes. This article is protected by copyright. All rights reserved.
METHODS: Our retrospective, single-centre analysis included all patients who received their kidney transplant between 2007 and 2017, with documented admission albumin levels prior to surgery. Survival analyses were undertaken to explore the relationship of pre-transplant hypoalbuminaemia versus other baseline variables upon post-transplant outcomes.
RESULTS: We analysed 1,131 kidney allograft recipients transplanted at our center (2007-2017), with median follow up 746 days (IQR 133-1,750 days). Kidney transplant recipients with pre-operative hypoalbuminaemia were more likely older, female, recipients of deceased-donor kidneys and to have longer cold ischaemic times. Recipients with pre-operative hypoalbuminaemia had longer hospital admissions post-operatively but no difference in delayed graft function rates. There was no difference in 1-year creatinine but recipients with hypoalbuminaemia had reduced risk for cellular rejection. We observed significantly worse patient survival (83.2% versus 90.7%, p<0.001) and overall graft survival (72.5% versus 82.0%, p<0.001) for recipients with hypoalbuminaemia versus normal albumin levels respectively but no difference in death-censored graft survival. In a Cox regression model, adjusted for baseline pre-operative variables, hypoalbuminaemia was independently associated with an increased risk for overall graft loss after kidney transplantation (hazard ratio 1.468, 95% CI 1.087-1.982, p=0.012).
CONCLUSIONS: Pre-operative hypoalbuminaemia is an independent risk factor for overall graft loss after kidney transplantation. Further work is warranted to investigate the underlying pathophysiology to determine what supportive measures can be undertaken to attenuate adverse post-transplant outcomes. This article is protected by copyright. All rights reserved.
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