Reference Values for Commonly Ordered Blood Tests
| REFERENCE VALUES FOR COMMONLY ORDERED BLOOD TESTS | ||
|---|---|---|
| Analyte | Reference value | |
| Conventional units | SI units | |
| Antithrombin III | ||
| Antigenic | 22–39 mg/dL | 220–390 mg/liter |
| Functional | 80–130% | 0.8–1.30 U/liter |
| Bleeding time | 2.0–9.5 min | 2.0–9.5 min |
| Erythrocyte count | ||
| Male | 4.50–5.90 × 106/mm3 | 4.50–5.90 × 1012/liter |
| Female | 4.00–5.20 × 106/mm3 | 4.00–5.20 × 1012/liter |
| Erythrocyte sedimentation rate | ||
| Male | 0–17 mm/hr | 0–17 mm/hr |
| Female | 1–25 mm/hr | 1–25 mm/hr |
| Ferritin | ||
| Male | 30–300 ng/mL | 30–300 μg/liter |
| Female | 10–200 ng/mL | 10–200 μg/liter |
| Fibrinogen | 150–400 mg/dL | 1.50–4.00 g/liter |
| Folate (folic acid) | ||
| Normal | 3.1–17.5 ng/mL | 7.0–39.7 nmol/liter |
| Borderline deficient | 2.2–3.0 ng/mL | 5.0–6.8 nmol/liter |
| Deficient | <2.2 ng/mL | <5.0 nmol/liter |
| Excess | >17.5 ng/mL | >39.7 nmol/liter |
| Folic acid | 150–450 ng/mL/cells | 340–1020 nmol/liter/cells |
| Hematocrit | ||
| Male | 41.0–53.0% | 0.41–0.53 |
| Female | 36.0–46.0% | 0.36–0.46 |
| Hemoglobin | ||
| Plasma | 1–5 mg/dL | 0.01–0.05 g/liter |
| Whole blood, male | 13.5–17.5 g/dL | 8.4–10.9 mmol/liter |
| Whole blood, female | 12.0–16.0 g/dL | 7.4–9.9 mmol/liter |
| Hemoglobin electrophoresis | ||
| Hemoglobin A | 95–98% | 0.95–0.98 |
| Hemoglobin A1c | 3.8–6.4% | 0.038–0.064 Hg fraction |
| Hemoglobin A2 | 1.5–3.5% | 0.015–0.035 |
| Hemoglobin F | 0–2.0% | 0–0.02 |
| Hemoglobins other than A, A2, or F | Absent | Absent |
| Iron (hematology and coagulation values) | 30–160 μg/dL | 5.4–28.7 μmol/liter |
| Iron-binding capacity
(hematology and coagulation values) |
228–428 μg/dL | 40.8–76.7 μmol/liter |
| Iron (clinical chemistry values) | 50–150 μg/dL | 9–27 μmol/liter |
| Iron-binding capacity
(clinical chemistry values) |
250–370 μg/dL | 45–66 μmol/liter |
| Leukocyte count (WBC) | 4.5–11.0 × 103/mm3 | 4.5–11 × 109/liter |
| Mean corpuscular hemoglobin (MCH) | 26.0–34.0 pg/cell | 26.0–34.0 pg/cell |
| Mean corpuscular hemoglobin
concentration (MCHC) |
31.0–37.0 g/dL | 310–370 g/liter |
| Mean corpuscular volume (MCV) | 80–100 μm3 | 80–100 fl |
| Partial-thromboplastin time (activated) | 22.1–35.1 sec | 22.1–35.1 sec |
| Platelet count | 150–350 × 103/mm3 | 150–350 × 109/liter |
| Prothrombin time | 11.1–13.1 sec | 11.1–13.1 sec |
| Reticulocyte count | 0.5–2.5% red cells | 0.005–0.025 red cells |
| Transferrin | 230–390 mg/dL | 2.3–3.9 g/liter |
| Vitamin B12 | ||
| Normal | >250 pg/mL | >185 pmol/liter |
| Borderline | 125–250 pg/mL | 92–185 pmol/liter |
| Deficient | <125 pg/mL | <92 pmol/liter |
| NOTES | ||
|
National Institutes of Health. Third report of the Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults (Adult Treatment Panel III). September 2002. Available at: www.nhlbi.nih.gov/guidelines/cholesterol/index.htm. Accessed August 2012 (Rev. 8/2012) |
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