Let’s explore “Total T3 — lab reference”

150-199 borderline high; 200-499 high; ≥500 severe and pancreatitis-relevant.

Risk-based goals may be lower; useful when triglycerides are elevated.

Often calculated. Less reliable when triglycerides are markedly elevated.

90-99 above desirable; 100-119 borderline high; 120-139 high; ≥140 very high. Risk goals may be lower.

The test method matters. Ask your clinician to read this result with HDL and ApoB.

Approximate risk strata are sex-specific and assay-dependent.

≥75 increased; ≥125 commonly treated as a risk-enhancing level. Units are not directly interchangeable with mg/dL.

≥2 suggests higher cardiovascular risk; >10 may reflect acute inflammation and should generally be repeated when well.

Age, kidney function, obesity, rhythm, and clinical setting affect interpretation.

The test method and the reason for testing affect which cutoff your clinician uses.

Advanced lipoprotein testing. Ask your clinician to use the performing laboratory classification.

Method, units, and cutoffs vary. Dr. Purser to decide whether to retain.