Free T4 — lab reference
In the reference guideBinding abnormalities and severe illness may affect some free-hormone assays.
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What’s searchable?Free T3 — lab reference
Some search terms matchedUseful in selected hyperthyroid states; not a sensitive stand-alone test for hypothyroidism.
Total T4 — lab reference
Some search terms matchedAffected by thyroid-binding globulin, pregnancy, estrogen, and medications.
Testosterone, free — lab reference
Some search terms matchedMayo example age 20-24: M 5.25-20.7; F <0.13-1.08. Declines with age and is method-dependent.
Free PSA / total PSA — lab reference
Some search terms matchedOften used when total PSA is in an indeterminate zone. Use the performing-lab risk table.
Plasma free metanephrines — lab reference
Some search terms matchedSupine collection and stress control improve specificity; use exact lab cutoffs.
White blood cell count (WBC) — lab reference
Some search terms matchedLab-specific. Interpret with symptoms, medication effects, and differential.
Red blood cell count (RBC) — lab reference
Some search terms matchedAltitude, smoking, hydration, androgen therapy, and pregnancy may shift values.
Hemoglobin — lab reference
Some search terms matchedConsider altitude and iron/B12/folate status. Pregnancy requires trimester-specific ranges.
Hematocrit — lab reference
Some search terms matchedHydration and altitude are major modifiers. Review alongside hemoglobin and RBC indices.
Mean corpuscular volume (MCV) — lab reference
Some search terms matchedMacrocytosis and microcytosis require cause-specific interpretation.
Mean corpuscular hemoglobin (MCH) — lab reference
Some search terms matchedAnalyzer-specific. Review with MCV and MCHC.
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