Clinical predictors of non-diabetic renal disease in patients with non-insulin dependent diabetes mellitus

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Abstract
BACKGROUND: Several studies had suggested that non-diabetic renal disease (NDRD) was common among non-insulin dependent diabetes mellitus (NIDDM) patients with renal involvement. METHODS: We prospectively studied the prevalence of NDRD among a Chinese NIDDM population. Renal biopsy specimens were evaluated with light-, immunohistological and electron-microscopy. The cohort consisted of 51 patients who had NIDDM and proteinuria > 1 g/24 h. RESULTS: Patients with both isolated diabetic nephropathy (DN, n = 34) and NDRD (n = 17) had comparable duration of DM, creatinine clearance, serum creatinine, albumin and glycosylated haemoglobin levels, as well as incidences of retinopathy, neuropathy and hypertension. Significantly more patients with NDRD had microscopic haematuria (P = 0.043) or non-nephrotic proteinuria (P = 0.004). IgA nephropathy accounted for 59% of the NDRD identified. CONCLUSIONS: In this study, microscopic haematuria and non-nephrotic proteinuria predicted the presence of NDRD among NIDDM patients presenting with renal disease.

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