Diabetes Care, Vol 18, Issue 7 971-974, Copyright © 1995 by American Diabetes Association

ARTICLES

The prevalence and severity of microvascular complications in pancreatic diabetes and IDDM

NS Levitt, G Adams, J Salmon, IN Marks, G Musson, C Swanepoel, M Levy and MJ Byrne
Department of Medicine, University of Cape Town, South Africa.

OBJECTIVE--To investigate and compare the prevalence, associations, and severity of retinopathy and nephropathy in patients with pancreatic diabetes (PD) and insulin-dependent diabetes mellitus (IDDM). RESEARCH DESIGN AND METHODS--Thirty patients with PD due to alcohol-induced chronic pancreatitis were matched for age, sex, and duration of diabetes with 30 patients with IDDM. Retinopathy was assessed by fluorescein angiography using the Wisconsin classification. Renal function was assessed by albumin excretion rates (AERs) in at least two timed overnight urine collections and glomerular filtration rates (GFRs) by single injection of 51Cr-EDTA. Microalbuminuria was defined as AER 20-200 micrograms/min and nephropathy as AER > 200 micrograms/min. RESULTS--Retinopathy was found in 33% of patients with PD and in 40% with IDDM. The spectrum of disease was similar in the two groups. The geometric mean of AER was 15 micrograms/min (range 1-1,541) in the PD group and 24 micrograms/min (2-2,288) in the IDDM group. Nephropathy was found in 7 PD and in 5 IDDM patients, and a reduced GFR was present in 8 (26%) and 4 (13%) of the two groups, respectively. Microalbuminuria occurred in 9 (33%) and hyperfiltration in 3 (10%) in each group. These differences were insignificant. Retinopathy correlated with AER in both groups. Retinopathy and AER correlated with duration of diabetes in the IDDM but not in the PD group. CONCLUSIONS--Microvascular complications are equally common and severe in PD and IDDM, and improved glycemic control should be the goal in both.
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