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Published in: BMC Nephrology 1/2020

01-12-2020 | Diabetic Retinopathy | Research article

Timing of kidney biopsy in type 2 diabetic patients: a stepwise approach

Authors: Jyh-Tong Hsieh, Fu-Pang Chang, An-Hang Yang, Der-Cherng Tarng, Chih-Yu Yang

Published in: BMC Nephrology | Issue 1/2020

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Abstract

Background

Diabetic nephropathy (DN) is the most prevalent cause of renal disease in type 2 diabetic patients and is usually diagnosed clinically. A kidney biopsy is considered when non-diabetic renal disease (NDRD) is suspected, such as rapid progression in renal function impairment and severe proteinuria. Still, there is yet no consensus on the timing of kidney biopsy in type 2 diabetic patients. This study aims to identify markers that can help differentiate between DN and NDRD and guide the decision of kidney biopsy.

Methods

We retrospectively reviewed patients with type 2 diabetes who received kidney biopsy from 2008 to 2017 at Taipei Veterans General Hospital. Ophthalmologist consultation and outpatient records, diagnosis of kidney biopsy, laboratory data, and clinical characteristics were collected.

Results

This study enrolled 160 type 2 diabetic patients, among which 120 (75%) had isolated DN and 40 (25%) had NDRD ± DN (26 had isolated NDRD, and 14 had NDRD superimposed on DN). In multivariate logistic regression analysis, DM duration (odds ratio [OR]: 0.907; 95% confidence interval [CI]: 0.842–0.977; P = 0.01), diabetic retinopathy (OR: 0.196; 95% CI: 0.061–0.627; P = 0.006), and urinary RBC (OR: 1.068; 95% CI: 1.024–1.115; P = 0.002) were independent predictors of NDRD. In patients with diabetic retinopathy (n = 112, 70%), the presence of proliferative diabetic retinopathy, pan-retinal photocoagulation, and hematuria were factors predicting NDRD; and in patients without diabetic retinopathy (n = 48, 30%), short DM duration and hematuria were factors predicting NDRD.

Conclusions

Using diabetic retinopathy, DM duration, and hematuria, we developed a 3-step approach to stratify patients into three categories with the different likelihoods of having NDRD. Then different strategies could be taken accordingly. Our stepwise approach is easy to follow and may serve as an appropriate and useful tool to help clinicians in making decisions of kidney biopsy in type 2 DM patients presenting with kidney diseases.
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Metadata
Title
Timing of kidney biopsy in type 2 diabetic patients: a stepwise approach
Authors
Jyh-Tong Hsieh
Fu-Pang Chang
An-Hang Yang
Der-Cherng Tarng
Chih-Yu Yang
Publication date
01-12-2020
Publisher
BioMed Central
Published in
BMC Nephrology / Issue 1/2020
Electronic ISSN: 1471-2369
DOI
https://doi.org/10.1186/s12882-020-01794-w

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