reference range


Also found in: Encyclopedia, Wikipedia.

reference range

Lab medicine A set of values established as normal maximums or minimums for a given analyte. Cf Decision levels, Panic values.

ref·er·ence range

(ref'rĕns rānj)
The usual range of test values for a healthy population.
Synonym(s): normal range.
References in periodicals archive ?
The patient's 24-h urine protein was 0.352 g/day, which was above the reference range of 0.00-0.14 g/day).
Each patient had fever, jaundice, asthenia, thrombocytopenia (57,000 [patient A] and 61,000 [patient B] platelets/[mm.sup.3]; reference range >150,000 platelets/[mm.sup.3]), and hepatitis (alanine aminotransferase [ALT] >5,000 IU/L and aspartate aminotransferase [AST] >3,400 IU/L; reference range <40 IU/L).
A hospital based study on reference range of serum prostate specific antigen levels.
Laboratory hematological parameters were as follows; hemoglobin was 7.0 g/dl (reference range 12.0-15.5), white blood cell count was 18.0x109/L (reference range, 3.5-10.5x109/L) and consisted of 77% neutrophils, 8% monocytes, 13% lymphocytes, 1% basophils, and 1% eosinophils.
Anderson, MD, reported that free thyroxine levels within the normal reference range were associated in graded fashion with an increased prevalence and incidence of atrial fibrillation in a large Utah study, a finding that provides independent confirmation of an earlier report by investigators from the population-based Rotterdam Study.
The researchers found that after treatment (range, three to 18 months), thyroid hormone therapy was associated with a reduction in the mean thyrotropin value to the normal reference range versus placebo, but it was not associated with benefit regarding general quality of life or thyroid-related symptoms.
Post-Mortem Brain Weight Reference Range for a Select South African Population
Laboratory investigations showed a white blood cell count of 23,000/uL (reference range, 4000-10,000/uL), C-reactive protein level of 14.21 mg/dL (reference range, <0.5 mg/dL), D-dimer level of 6923 ng/mL (reference range, <0.5 ng/mL), and creatine kinase level of 429 U/L (reference range, 30-160 U/L).
Cerebral spinal fluid (CSF) found 24 white blood cells/[mm.sup.3] (reference range 0-5 cells/[mm.sup.3]) with 83% lymphocytes (reference range 0-60%), 8 red blood cells/ [mm.sup.3] (reference range 0-0 cells/[mm.sup.3]), glucose of 35mg/dL (reference range 40-70 mg/dL), protein of 247.6 mg/dL (reference range 15-45 mg/dL), and no oligoclonal bands.
Initial biochemistry showed hypokalemia with potassium of 2.3 mmol/L (reference range: 3.5-5.2 mmol/L) and hypomagnesaemia with magnesium of 0.59 mmol/L (reference range: 0.70-1.10 mmol/L).
The laboratory reports showed elevated serum level of C-reactive protein (11.6 mg/L, reference range 0.6-6.0 mg/L), erythrocyte sedimentation rate (66.00 mm/H, reference range 0-20 mm/hour) and depressed hemoglobin (112 g/L, reference range 115-150 g/L), while other measured laboratory data were within normal limits including serum leukocyte, tumor markers and anti-mycobacterium tuberculosis antibody.
In the study of Roberts and Kraft, low-density lipoprotein values moved into the female reference range for individuals transitioning from male to female (20).