Impaired kidney function at hospital discharge and long-term renal and overall survival in patients who received CRRT

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Abstract

Background and objectives Critically ill patients with AKI necessitating renal replacement therapy (RRT) have high in-hospital mortality, and survivors are at risk for kidney dysfunction at hospital discharge. The objective was to evaluate the association between impaired kidney function at hospital discharge with long-term renal and overall survival. Design, setting, participants, & measurements Degree of kidney dysfunction in relation to long-term effects on renal survival and patient mortality was investigated in a retrospective cohort study of 1220 adults admitted to an intensive care unit who received continuous RRT between 1994 and 2010. ResultsAfter hospital discharge,median follow-up of survivors (n=475)was 8.5 years (range, 1-17 years); overall mortality ratewas 75%.Only 170 (35%) patientswere dischargedwith an estimated GFR (eGFR)>60 ml/min per 1.73 m2. Multivariate proportional hazards regression analysis demonstrated that age, nonsurgical type of admission, preexisting kidney disease, malignancy, and eGFR of 29-15 ml/min per 1.73 m2 (hazard ratio [HR], 1.62; 95% confidence interval [CI], 1.01 to 2.58) and eGFR<15 ml/min per 1.73 m2 (HR, 1.93; 95% CI, 1.23 to 3.02) at discharge were independent predictors of increased mortality. Renal survival was significantly associated with degree of kidney dysfunction at discharge. An eGFR of 29-15 ml/min per 1.73 m2 (HR, 26.26; 95% CI, 5.59 to 123.40) and<15 ml/min per 1.73 m2 (HR, 172.28; 95% CI, 37.72 to 786.75) were independent risk factors for initiation of long-term RRT. Conclusions Most critically ill patients surviving AKI necessitating RRT have impaired kidney function at hospital discharge. An eGFR,30 ml/min per 1.73 m2 is a strong risk factor for decreased long-term survival and poor renal survival. © 2013 by the American Society of Nephrology.

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Stads, S., Fortrie, G., Van Bommel, J., Zietse, R., & Betjes, M. G. H. (2013). Impaired kidney function at hospital discharge and long-term renal and overall survival in patients who received CRRT. Clinical Journal of the American Society of Nephrology, 8(8), 1284–1291. https://doi.org/10.2215/CJN.06650712

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