LIPID-LEVELS AND PERIPHERAL VASCULAR-DISEASE IN DIABETIC AND NONDIABETIC SUBJECTS

Non-insulin dependent diabetes (NIDDM) is associated with an increased risk of peripheral vascular disease (PVD), but within the diabetic po pulation the relationship between lipid profile and PVD has not been c learly defined. In this study we examined the association of lipid par ameters and in particular low density lipoprotein (LDL) particle size, with the presence of PVD in subjects with and without NIDDM. 41 NIDDM patients and 31 non-diabetic subjects with PVD in the absence of rest pain or ulceration, defined by ankle-brachial index measurements and duplex scanning, were compared with 41 NIDDM and 31 euglycemic control subjects of comparable age and sex, without PVD. In both groups those with PVD were found to have significantly elevated triglycerides (2.7 [2.2-3.3] versus 1.9 [1.6-2.2] mmol/l; P < 0.05 in the diabetic group and 2.0 [1.6-2.3] versus 1.4 [1.1-1.5] mmol/l; P < 0.05 in the non-di abetic group), decreased apolipoprotein Al (124 +/- 3 versus 139 +/- 5 mg/dl; P < 0.01 in the diabetic group and 133 +/- 4 versus 147 +/- 4 mg/dl; P < 0.05 in the non-diabetic group) and decreased LDL particle size (25.4 +/- 0.1 versus 25.8 +/- 0.1 nm; P < 0.01 in the diabetic gr oup and 26.0 +/- 0.1 versus 26.3 +/- 0.1 nm; P < 0.05 in the non diabe tic group). In the non-diabetic group apolipoprotein[a] (365 [239-554] versus 184 [17-266] U/l; P < 0.01), total cholesterol (6.3 +/- 0.2 ve rsus 5.6 +/- 0.2 mmol/l; P < 0.05), LDL cholesterol (4.1 +/- 0.2 versu s 3.6 +/- 0.2 mmol/l; P < 0.05) and apolipoprotein B (146 +/- 8 versus 117 +/- 5 mg/dl; P < 0.05) were also found to be associated with PVD although these associations were not observed in the group with diabet es. In addition, 11 NIDDM subjects and 11 non-diabetic subjects with r est pain or ulceration were compared to the corresponding groups with uncomplicated PVD and had lipid profiles with significantly lower leve ls of total cholesterol and LDL cholesterol. We conclude that the dysl ipidemic profile characterized by increased triglyceride level, decrea sed apolipoprotein Al level and small dense LDL is associated with unc omplicated PVD in both NIDDM and non-diabetic subjects. (C) 1998 Elsev ier Science Ireland Ltd.