Non-HDL cholesterol and apolipoprotein B in the dyslipidemic classification of type 2 diabetic patients.
OBJECTIVE
To compare non-HDL cholesterol (HDLc) and apolipoprotein B (apoB) in the identification of nonconventional high-risk dyslipidemic phenotypes in type 2 diabetic patients.


METHODS
Total cholesterol and triglycerides, HDLc, LDL cholesterol, non-HDLc, apolipoprotein B (apoB), and LDL size were determined in 122 type 2 diabetic patients (68% male, aged 59.6 +/- 9.7 years, and HbA(1c) 7.5% [range 5.2-16.0]). They were then classified as normo- and hypertriglyceridemic if their triglyceride concentrations were below/above 2.25 mmol/l, as normo/hyper-non-HDLc if non-HDLc concentrations were below/above 4.13 mmol/l, and as normo- and hyperapoB if apoB concentrations were below/above 0.97 g/l. Both classifications were compared (concordance assessed with the kappa index), and low HDLc and LDL phenotype B were identified in each category.


RESULTS
A total of 26 patients were hypertriglyceridemic and 96 were normotriglyceridemic. All hypertriglyceridemic subjects had increased non-HDLc, whereas 24 had increased apoB (kappa= 0.95). In the normotriglyceridemic group, 44 had increased non-HDLc, 68 had increased apoB, and 25 of the 52 patients with normal non-HDLc had increased apoB (kappa= 0.587). Low HDLc and LDL phenotype B were similarly distributed into the equivalent categories.


CONCLUSIONS
Non-HDLc and apoB are equivalent risk markers in hypertriglyceridemic patients, but apoB identifies additional patients with high-risk dyslipidemic phenotypes in normotriglyceridemic type 2 diabetic patients.
Wägner
Ana Maria
AM
Endocrinology and Nutrition Department, Hospital de Sant Pau, Universitat Autònoma, Barcelona, Spain. awagner@hsp.santpau.es
Pérez
Antonio
A
Zapico
Edgar
E
Ordóñez-Llanos
Jordi
J
D001055:Apolipoproteins B / Q000097:blood*; D002784:Cholesterol / Q000097:blood*; D008078:Cholesterol, LDL / Q000097:blood*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000150:complications; D005260:Female; D006801:Humans; D006949:Hyperlipidemias / Q000097:blood / Q000145:classification* / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D012727:Sex Characteristics; D014280:Triglycerides / Q000097:blood
D001055:Apolipoproteins B; D008078:Cholesterol, LDL; D014280:Triglycerides; D002784:Cholesterol