Lipid abnormalities in untreated maturity-onset diabetics and the effect of treatment.

Plasma cholesterol and serum triglyceride levels and frequency of lipoprotein abnormalities were investigated in 126 untreated maturity-onset diabetics and 126 age- and sex-matched control subjects. Serum triglyceride levels were higher (mean: 1.67 mmol/l) and type IV hyperlipoproteinaemia occurred more frequently (16.7%) in the diabetic group as compared with the controls (1.29 mmol/l and 4.8% respectively). These findings were not explained by an excessive frequency of renal disease, hypertension or drug treatment amongst the diabetics. Normal men showed higher serum triglyceride (mean: 1.36 mmol/l) and lower plasma cholesterol (mean: 5.6 mmol/l) levels than normal women (1.21 mmol/l and 6.4 mmol/l respectively). No sex difference was seen amongst the diabetics. Triglyceride levels fell after one month of dietary treatment but only remained lowered in diabetics who required sulphonylureas for glycaemic control. After treatment for one year the correlation between serum triglycerides and blood glucose rose from r = 0.15 (NS) before treatment to r = 0.43 (p less than 0.001). Similarly the correlation between serum triglycerides and ponderal index rose from r = 0.19 (NS) to r = 0.28 (p less than 0.02).