Apolipoprotein B Discordance With LDL and Non-HDL Cholesterol in Relation to Coronary Artery Calcification (MESA)

This MESA analysis examined what happens when apolipoprotein B and the standard cholesterol numbers disagree — the situation called “discordance” — and whether apoB then tracks subclinical disease better.

Across more than 4,600 multi-ethnic adults, higher apoB was consistently associated with the presence, onset, and progression of coronary artery calcium. People whose apoB was discordantly high relative to their LDL or non-HDL cholesterol showed more calcium progression than those whose numbers agreed — the atherogenic-particle count flagging risk the cholesterol number underplayed. The nuance: in this older cohort, adding apoB on top of the standard measures gave only modest extra predictive value, whereas the advantage tends to be larger in younger populations.

The study reinforces the core apoB rationale while honestly bounding it: discordance identifies people at higher risk than their LDL suggests, but the incremental gain depends on the population.

We rate the evidence strong. It is a well-conducted analysis from a premier cohort, advancing the apoB-versus-LDL question while candidly noting where the added value is only modest.