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  • Title: Severity of diabetic retinopathy is linked to lipoprotein (a) in type 1 diabetic patients.
    Author: Guerci B, Meyer L, Sommer S, George JL, Ziegler O, Drouin P, Angioï-Duprez K.
    Journal: Diabetes Metab; 1999 Nov; 25(5):412-8. PubMed ID: 10592864.
    Abstract:
    To determine the relationship between plasma Lp(a) concentration and the risk of developing diabetic retinopathy, 341 Type 1 diabetic patients underwent an annual retinal fluorescein angiography and were assigned to one of 3 groups according to the stage of their diabetic retinopathy: no retinopathy (NR), non-proliferative diabetic retinopathy (N-PDR), or proliferative diabetic retinopathy (PDR). One hundred and twenty-three Type 1 diabetic patients had no retinopathy, 188 had N-PDR and 30 had PDR. The ages of the three groups and the duration of diabetes were significantly different. Hypertension, microalbuminuria and diabetic nephropathy were more frequent in PDR than in NR or N-PDR (p < 0.0001). Plasma HbA1c was higher in PDR than in NR or N-PDR (p < 0.01). Type 1 patients who had been diabetic for at least 20 years included 30 NR, 108 N-PDR and 24 PDR. Type 1 diabetic patients with PDR had microalbuminuria and macroproteinuria more frequently than other patients (p < 0.0001 and 0.01, respectively). Type 1 diabetic patients with PDR had the highest median plasma Lp(a) and the highest frequency of Lp(a) above 30 mg/dl (p < 0.05). Multivariate analysis carried out in Type 1 diabetic patients with a duration of diabetes of at least 20 years showed that microproteinuria, HbA1c and Lp(a) accounted significantly for 21% of variance in retinal status. Lp(a) above 30 mg/dl was related to the risk of developing PDR (OR = 8.40, p < 0.05). Lipoprotein(a) appears to be associated with the severity of diabetic retinopathy in Type 1 diabetic patients, and particular attention should be paid to those with Lp(a) above 30 mg/dl and pre-proliferative retinopathy.
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