An instrumental variable approach finds no associated harm or benefit with early dialysis initiation in the United States View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2014-10

AUTHORS

Julia J Scialla, Jiannong Liu, Deidra C Crews, Haifeng Guo, Karen Bandeen-Roche, Patti L Ephraim, Navdeep Tangri, Stephen M Sozio, Tariq Shafi, Dana C Miskulin, Wieneke M Michels, Bernard G Jaar, Albert W Wu, Neil R Powe, L Ebony Boulware

ABSTRACT

The estimated glomerular filtration rate (eGFR) at dialysis initiation has been rising. Observational studies suggest harm, but may be confounded by unmeasured factors. As instrumental variable methods may be less biased, we performed a retrospective cohort study of 310,932 patients who started dialysis between 2006 and 2008 and were registered in the United States Renal Data System in order to describe geographic variation in eGFR at dialysis initiation and determine its association with mortality. Patients were grouped into 804 health service areas (HSAs) by zip code. Individual eGFR at dialysis initiation averaged 10.8 ml/min per 1.73 m(2) but varied geographically. Only 11% of the variation in mean HSA-level eGFR at dialysis initiation was accounted for by patient characteristics. We calculated demographic-adjusted mean eGFR at dialysis initiation in the HSAs using the 2006 and 2007 incident cohort as our instrument and estimated the association between individual eGFR at dialysis initiation and mortality in the 2008 incident cohort using the two-stage residual inclusion method. Among 89,547 patients starting dialysis in 2008 with eGFR 5-20 ml/min per 1.73 m(2), eGFR at initiation was not associated with mortality over a median of 15.5 months (hazard ratio, 1.025 per 1 ml/min per 1.73 m(2) for eGFR 5-14 ml/min per 1.73 m(2); and 0.973 per 1 ml/min per 1.73 m(2) for eGFR 14-20 ml/min per 1.73 m(2)). Thus, there was no associated harm or benefit with early dialysis initiation in the United States. More... »

PAGES

798-809

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/ki.2014.110

DOI

http://dx.doi.org/10.1038/ki.2014.110

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1052993528

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/24786707


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