Background: Triglyceride (TG) levels measured in either the fasting or non-fasting state predict the risk of cardiovascular disease (CVD). Since CVD risk assessment is affected by variability in TG, the aim of the study was to investigate intra-individual variability of non-fasting TG. Methods: Capillary triglyceride (cTG) levels were measured in 246 free-living individuals at six time-points during the day on three separate occasions. Intra-individual variability in cTG was assessed by calculating the standard deviation of three measures at each time-point. Subjects were analyzed by gender and by fasting TG level. Results: In the fasting state, intra-individual variability was similar in males and females (0.28 and 0.35. mmol/l, respectively), but increased significantly in male but not in female subjects during the day, i.e., 0.28 to 0.69, and 0.35 to 0.36. mmol/l, resp. Subjects with higher fasting TG levels had greater absolute variability in both fasting and non-fasting TG. Conclusions: The variability in non-fasting TG is greater in males and in individuals with higher levels of TG. Since greatest variability in non-fasting TG occurs very late in the day, it is unlikely to affect the assessment of CVD risk, which is based on a blood sample taken during daylight hours.

Atherosclerosis, Gender, Postprandial lipemia, Variance,
Clinica Chimica Acta
Erasmus School of Health Policy & Management (ESHPM)

Klop, B, Cohn, J.S, van Oostrom, A.J.H.H.M, van Wijk, J.P.H, Birnie, E, & Castro Cabezas, M. (2011). Daytime triglyceride variability in men and women with different levels of triglyceridemia. Clinica Chimica Acta, 412(23-24), 2183–2189. doi:10.1016/j.cca.2011.08.010