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  • Title: The association between an abnormal post-voiding urine volume and a lower estimated glomerular filtration rate in patients with type 2 diabetes with no voiding symptoms.
    Author: Cho JA, Cho ST, Lee YK, Oh J, Kim SG, Seo JW, Yoon JW, Koo JR, Kim HJ, Lee YS, Lee YG, Noh JW.
    Journal: Korean J Intern Med; 2015 Jan; 30(1):82-7. PubMed ID: 25589839.
    Abstract:
    BACKGROUND/AIMS: Diabetic cystopathy is a frequent complication of diabetes mellitus. This study assessed the association between the post-voiding residual (PVR) urine volume and diabetic nephropathy in type 2 diabetics with no voiding symptoms. METHODS: This study investigated 42 patients with type 2 diabetes who were followed regularly at our outpatient clinic between July 1, 2008 and June 30, 2009. No patient had voiding problems or International Prostate Symptom Scores (IPSSs) ≥ 12. An urologist performed the urological evaluations and the PVR was measured using a bladder scan. A PVR > 50 mL on two consecutive voids was considered abnormal, which was the primary study outcome. RESULTS: The mean patient age was 60 ± 10 years; the IPSS score was 3.7 ± 3.3; and the diabetes duration was 11.9 ± 7.8 years. Seven of the 42 patients (16.7%) had a PVR > 50 mL. The presence of overt proteinuria or microalbuminuria was associated with an increased risk of a PVR > 50 mL (p < 0.01). Patients with a PVR > 50 mL had a significantly lower estimated glomerular filtration rate (eGFR) compared with those with a PVR ≤ 50 mL (59.2 ± 27.1 mL/min/1.73 m(2) vs. 28.7 ± 23.3 mL/min/1.73 m(2); p < 0.001). Multivariate logistic analysis revealed that a lower eGFR (odds ratio, 0.94; 95% confidence interval, 0.88 to 0.99; p = 0.04) was a significant risk factor for a PVR > 50 mL. CONCLUSIONS: Patients with diabetic nephropathy had a significantly higher PVR and a lower eGFR was associated with an abnormal PVR.
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