Tracking serum lipid levels and the association of cholesterol concentrations, blood pressure and cigarette smoking with carotid artery intima-media thickness in young adults born small for gestational age.

BACKGROUND

Small birth size is associated with increased cardiovascular disease risk, but the mediating factors are poorly understood.

METHODS AND RESULTS

Serum lipids, blood pressure (BP), carotid artery intima-media thickness (CA-IMT), and brachial artery flow-mediated dilatation (BA-FMD) were studied in 70 20-year-old subjects [35 sex- and age-matched pairs born small (SGA) and appropriate for gestational age (AGA)]. The SGA subjects had higher serum levels of low-density lipoprotein (LDL) cholesterol, total/high-density lipoprotein (HDL) and LDL/HDL cholesterol ratios, and lower HDL cholesterol levels than the AGA subjects (2.71 vs 2.37 mmol/L, P<0.05; 3.12 vs 2.80, P<0.01; 1.98 vs 1.61, P=0.002; 1.43 vs 1.56 mmol/L, P<0.05, respectively). In the SGA group, total and LDL cholesterol levels correlated inversely with adult height SD score (r=0.463, P=0.006 and r=0.413, P=0.015, respectively). CA-IMT or BA-FMD did not differ between the groups, but cigarette smoking, higher diastolic BP, and shorter birth length associated with higher CA-IMT in the whole study population. A clear tracking of cholesterol levels was found from 12 to 20 years.

CONCLUSIONS

SGA subjects had more unfavorable lipid profiles than the controls, the shortest having the highest LDL cholesterol. Cigarette smoking, higher diastolic BP, and shorter birth length associated with higher CA-IMT in the whole study population. A clear tracking of cholesterol levels through adolescence enables early targeting of lifestyle counseling for reducing cardiovascular disease risk.