Who would benefit most from postprandial lipid screening?

Area of Science:

• Metabolic Health
• Cardiovascular Risk Assessment
• Lipid Metabolism

Background:

• Fasting triglycerides (TG) <150 mg/dL can precede a significant postprandial TG rise (≥220 mg/dL) after a high-fat meal (HFM).
• Identifying individuals who would benefit most from postprandial screening is crucial for risk stratification.

Purpose of the Study:

• To determine optimal fasting triglyceride (TG) cut points for identifying individuals who would benefit most from postprandial TG screening.
• To refine risk assessment for adverse postprandial lipid responses.

Main Methods:

• Secondary analysis of 7 studies with 156 healthy participants.
• Utilized two methods to establish fasting TG cut points: Method 1 (90% peak postprandial TG thresholds) and Method 2 (ROC curves for sensitivity/specificity).
• Participants consumed a standardized high-fat meal after an overnight fast.

Main Results:

• Method 1 indicated fasting TG >130 mg/dL predicted elevated postprandial TG (PPTG), while <66 mg/dL predicted normal PPTG.
• Method 2 identified fasting TG of 70 mg/dL (≈95% sensitivity) and 114 mg/dL (≈95% specificity).
• A moderate association (r=0.37) was found between fasting and PPTG for fasting TG 70-130 mg/dL, with 24% exhibiting elevated PPTG.

Conclusions:

• Postprandial TG testing is most valuable for individuals with fasting TG concentrations between 70-130 mg/dL.
• Outside this range, postprandial TG responses are generally predictable.
• Targeted postprandial TG screening can enable earlier detection of cardiovascular risk in select individuals.