Let’s explore “Total protein — lab reference”

Collection completeness must be assessed.

Morning collection preferred for men. Method and age matter; confirm unexpected low values.

No single normal cutoff fits every patient. Use age, baseline, trend, prostate size, risk factors, and shared decision-making.

Often used when total PSA is in an indeterminate zone. Use the performing-lab risk table.

Protein intake, hydration, catabolism, GI bleeding, and kidney function affect result.

Assay-specific; reflects approximately 2-3 weeks and is affected by protein turnover.

Depends on total testosterone, SHBG, albumin, calculation, and assay.

Adult interval. Pregnancy and pituitary disease require different interpretation.

Binding abnormalities and severe illness may affect some free-hormone assays.

Useful in selected hyperthyroid states; not a sensitive stand-alone test for hypothyroidism.

No broadly accepted treatment target. Dr. Purser to define whether and how this is used.

Assay-specific. Positive result supports thyroid autoimmunity but does not determine treatment alone.