What this panel supports, and what it does not

Total cholesterol, HDL-C, and triglycerides are measured directly; LDL-C and non-HDL-C are calculated from those measured values; and the calculation for LDL-C has a triglyceride ceiling above which it should not be reported as a number, while non-HDL-C does not share that limitation. The guided case and the three-panel decision worked through that calculation and that ceiling with concrete values.

None of this establishes a single universal numeric reference interval for any of these analytes, a single mandated triglyceride critical value, one correct LDL-C equation for every laboratory, or a specific treatment target. Reference and decision values are guideline- and risk-context dependent, and the exact equation, TG ceiling, and reporting rule in force are local laboratory decisions, with CAP requiring that the equation in use be disclosed to the ordering clinician; none of this is a fixed fact for every site. ApoB was introduced as a complementary, non-calculated measure that current guidance supports using selectively, particularly at higher triglycerides, but no single apoB cutoff or universal recommendation to replace LDL-C applies.

Separate what the analyzer measured from what the equation produced, know your laboratory's TG ceiling, and when in doubt, non-HDL-C is the calculated result that keeps working when a triglyceride result runs high.