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Background <p>Diabetic peripheral neuropathy (DPN) is highly prevalent in type 2 diabetes, but its specific impact on long-term renal outcomes remains unclear. We aimed to determine whether DPN, objectively assessed using the DPN-Check<sup>®</sup> device, independently predicts accelerated renal function decline.</p> Methods <p>This retrospective cohort study evaluated 323 Japanese patients with type 2 diabetes who underwent neuropathy assessment using DPN-Check<sup>®</sup> between 2015 and 2017. Propensity score matching for baseline covariates (including age, HbA1c, estimated glomerular filtration rate [eGFR], and albuminuria) yielded 174 well-matched patients (87 with DPN, 87 without DPN). The primary outcome was a composite of renal events (≥ 30% eGFR decline, renal replacement therapy, or renal or cardiovascular death) over a five-year follow-up. Secondary outcomes included annual eGFR slopes and sensitivity analyses stratified by baseline albuminuria categories.</p> Results <p>Over five years, renal events occurred significantly more frequently in the DPN group (19 versus 6 events; log-rank <i>P</i> &lt; 0.01). Multivariate Cox regression confirmed DPN as an independent predictor of renal events (adjusted hazard ratio 3.18, 95% CI 1.34 to 8.77, <i>P</i> &lt; 0.01). The DPN group exhibited a steeper annual eGFR decline (-1.9 vs. -1.1 mL/min/1.73 m<sup>2</sup>/year, <i>P</i> &lt; 0.01). Stratified analysis revealed that DPN significantly predicted renal events even in patients with normoalbuminuria.</p> Conclusions <p>DPN measured by DPN-Check<sup>®</sup> independently predicts subsequent renal deterioration in type 2 diabetes. Routine objective neuropathy screening can enhance renal risk stratification and guide clinical management.</p>

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Diabetic peripheral neuropathy as an independent predictor of renal function decline in type 2 diabetes: a propensity score-matched retrospective cohort study using DPN-Check®

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Hiroyuki Ito,
  • Manami Yamamoto,
  • Hideyuki Inoue,
  • Yuko Kuwahara,
  • I. Chiaki,
  • Mizuki Matsushita,
  • Suzuko Matsumoto,
  • Shinichi Antoku,
  • Tomoko Yamasaki,
  • Toshiko Mori,
  • Sayuri Miura,
  • Kenichi Nishio,
  • Akifusa Takaki,
  • Chizuko Yukawa

摘要

Background

Diabetic peripheral neuropathy (DPN) is highly prevalent in type 2 diabetes, but its specific impact on long-term renal outcomes remains unclear. We aimed to determine whether DPN, objectively assessed using the DPN-Check® device, independently predicts accelerated renal function decline.

Methods

This retrospective cohort study evaluated 323 Japanese patients with type 2 diabetes who underwent neuropathy assessment using DPN-Check® between 2015 and 2017. Propensity score matching for baseline covariates (including age, HbA1c, estimated glomerular filtration rate [eGFR], and albuminuria) yielded 174 well-matched patients (87 with DPN, 87 without DPN). The primary outcome was a composite of renal events (≥ 30% eGFR decline, renal replacement therapy, or renal or cardiovascular death) over a five-year follow-up. Secondary outcomes included annual eGFR slopes and sensitivity analyses stratified by baseline albuminuria categories.

Results

Over five years, renal events occurred significantly more frequently in the DPN group (19 versus 6 events; log-rank P < 0.01). Multivariate Cox regression confirmed DPN as an independent predictor of renal events (adjusted hazard ratio 3.18, 95% CI 1.34 to 8.77, P < 0.01). The DPN group exhibited a steeper annual eGFR decline (-1.9 vs. -1.1 mL/min/1.73 m2/year, P < 0.01). Stratified analysis revealed that DPN significantly predicted renal events even in patients with normoalbuminuria.

Conclusions

DPN measured by DPN-Check® independently predicts subsequent renal deterioration in type 2 diabetes. Routine objective neuropathy screening can enhance renal risk stratification and guide clinical management.