Language
English
Publication Date
12-1-2022
Journal
Clinical Kidney Journal
DOI
10.1093/ckj/sfac193
PMID
36381373
PMCID
PMC9664571
PubMedCentral® Posted Date
9-12-2022
PubMedCentral® Full Text Version
Post-print
Abstract
Background: Whether fracture rates, overall and by fracture site, vary by cause of kidney failure in patients receiving dialysis is unknown.
Methods: Using the US Renal Data System, we compared fracture rates across seven causes of kidney failure in patients who started dialysis between 1997 and 2014. We computed unadjusted and multivariable adjusted proportional sub-distribution hazard models, with fracture events (overall, and by site) as the outcome and immunoglobulin A nephropathy as the reference group. Kidney transplantation and death were competing events.
Results: Among 491 496 individuals, with a median follow-up of 2.0 (25%, 75% range 0.9-3.9) years, 62 954 (12.8%) experienced at least one fracture. Patients with diabetic nephropathy, vasculitis or autosomal polycystic kidney disease (ADPKD) had the highest (50, 46 and 40 per 1000 person-years, respectively), and patient with lupus nephritis had the lowest (20 per 1000 person-years) fracture rates. After multivariable adjustment, diabetic nephropathy [hazard ratio (HR) 1.43, 95% confidence interval 1.33-1.53], ADPKD (HR 1.37, 1.26-1.48), vasculitis (HR 1.22, 1.09-1.34), membranous nephropathy (HR 1.16, 1.02-1.30) and focal segmental glomerulosclerosis (FSGS) (HR 1.13, 1.02-1.24) were associated with a significantly higher, and lupus nephritis with a significantly lower (HR 0.85, 0.71-0.98) fracture hazard. The hazards for upper extremity and lower leg fractures were significantly higher in diabetic nephropathy, ADPKD, FSGS and membranous nephropathy, while the hazard for vertebral fracture was significantly higher in vasculitis. Our findings were limited by the lack of data on medication use and whether fractures were traumatic or non-traumatic, among other factors.
Conclusions: Fracture risk, overall and by fracture site, varies by cause of end-stage kidney disease. Future work to determine underlying pathogenic mechanisms contributing to differential risks might inform more tailored treatment strategies. Our study was limited by lack of data regarding numerous potential confounders or mediators including medications and measures or bone biomarkers.
Keywords
dialysis, end-stage kidney disease, fracture
Published Open-Access
yes
Recommended Citation
Ziolkowski, Susan; Liu, Sai; Montez-Rath, Maria E; et al., "Association Between Cause of Kidney Failure and Fracture Incidence in a National Us Dialysis Population Cohort Study" (2022). Faculty and Staff Publications. 4716.
https://digitalcommons.library.tmc.edu/baylor_docs/4716