Association of reduced inner retinal thicknesses with chronic kidney disease
Posted on 2020-02-01 - 04:42
Abstract Background Tissue derived biomarkers may offer utility as indicators of accumulated damage. Reduced thickness of retinal neuronal tissue and the vascular choroid have previously been associated with vascular damage and diabetes. We evaluated associations between retinal thickness, retinal microvascular and choroidal measures, and renal function in a population with a high burden of comorbidity. Methods Participants were recruited from nuclear cardiology or renal medicine clinics. Retinal and choroidal thickness were measured from spectral-domain optical coherence tomograms. Retinal microvascular parameters were assessed from digital fundus photographs using a semi-automated software package. Main Outcome Measure: Chronic kidney disease (CKD) categorised as: CKD stages 1–2, eGFR ≥60 ml/min/1.73m2; CKD stage 3, eGFR 30–59 ml/min/1.73m2, and CKD stages 4–5, eGFR ≤29 ml/min/1.73m2. Results Participants (n = 241) had a mean age of 65 years and a mean eGFR of 66.9 ml/min/1.73m2. Thirty–nine % of the cohort had diabetes and 27% were using diuretics. Thinning of the inner retina and changes to its microvascular blood supply were associated with lower eGFR and CKD stages 4 and 5, while no associations were found between the outer retinal layers or their choroidal blood supply and CKD of any stage. These associations remained following adjustment for age, mean arterial blood pressure, diabetes status, low-density lipoprotein, body mass index, and sex. Conclusions Inner retinal thinning and retinal microvascular variation is associated with advanced CKD (stages 4 & 5) independent of important confounding factors, but not with earlier stage CKD (stage 3) and, therefore, its utility as a biomarker for early CKD is not supported in this study.
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Paterson, Euan; Ravindran, Meera; Griffiths, Kayleigh; Velly, Claire; Cardwell, Chris; McCarter, Rachel; et al. (2020). Association of reduced inner retinal thicknesses with chronic kidney disease. figshare. Collection. https://doi.org/10.6084/m9.figshare.c.4839474.v1
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AUTHORS (15)
EP
Euan Paterson
MR
Meera Ravindran
KG
Kayleigh Griffiths
CV
Claire Velly
CC
Chris Cardwell
RM
Rachel McCarter
PN
Patrick Nicol
JC
Jay Chhablani
MR
Mohammed Rasheed
KV
Kiran Vupparaboina
TM
Thomas MacGillivray
MH
Mark Harbinson
AM
Alexander Maxwell
RH
Ruth Hogg
GM
Gareth McKay