Fasting and Nonfasting Lipids in Pediatric Patients: Implications for Universal Lipid Screening

This nationally representative cross-sectional study used NHANES data from 12,744 children and adolescents (ages 6–17) to compare fasting and nonfasting lipid measurements and assess whether fasting is necessary for screening programs.

Total cholesterol, HDL-C, and non-HDL-C differed minimally between fasting and nonfasting states in children. Non-HDL-C, which does not require fasting, was the most robust lipid screening parameter across both states. Triglycerides were meaningfully elevated in the nonfasting state, as expected. LDL-C calculated by Friedewald equation was unreliable in the nonfasting state due to triglyceride dependence.

The clinical implication is significant for pediatric screening programs: by requiring fasting before screening, healthcare systems create a practical barrier that reduces participation in childhood universal screening. The NHANES data demonstrate that non-HDL-C — a measure that captures all atherogenic lipoprotein cholesterol without the Friedewald equation’s triglyceride dependence — performs equivalently in fasting and nonfasting states and can serve as the primary childhood screening metric.

While this study examines pediatric data, the logic extends to adult non-fasting lipid screening where non-HDL-C and ApoB are increasingly recognized as more appropriate primary targets than LDL-C requiring fasting-dependent Friedewald calculation.

We rate the evidence moderate. A large nationally representative cross-sectional study establishing that non-HDL-C provides reliable lipid screening data in the nonfasting state — with direct implications for designing accessible universal lipid screening programs in children.