Longer sleep tied to higher diabetic nephropathy risk in Japanese T2D cohort
Observational data link longer sleep duration to faster diabetic nephropathy progression, with stronger effects in older patients or those with existing kidney impairment. The study cannot prove causation and calls for interventional confirmation. Evidence quality is moderate: prospective design with repeated measures but limited to one population and subject to unmeasured confounding.
Next steps require an RCT randomizing long-sleeping patients with early nephropathy to sleep-restriction counseling versus usual care, powered for sustained change in UACR at 24 months. Such a trial would clarify causality and define safe sleep targets.
Ikeda group: A 12-month sleep-restriction pilot in 120 long-sleeping T2D patients will show ≥20% UACR reduction in the intervention arm versus control at p<0.05.
Sources (3)
- [1]Primary Source(https://doi.org/10.1210/jendso/bvag201)
- [2]Supporting Source(https://www.nejm.org/doi/10.1056/NEJMra1514252)
- [3]Supporting Source(https://diabetesjournals.org/care/article/46/Supplement_1/S1/148058/1-Introduction-and-Scope)