Laboratory Values - AMA Manual of Style

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Laboratory Values 

Laboratory Values

Chapter:
Correct and Preferred Usage
Author(s):

Roxanne K. Young

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Laboratory Values

Usually, in reports of clinical or laboratory data, the substance per se is not reported; rather, a value is given that was obtained by measuring a substance or some function or constituent of it. For example, one does not report hemoglobin but hemoglobin level. Some other correct forms are as follows:

differential white blood cell count

agglutination titer

prothrombin time

pulse rate

erythrocyte sedimentation rate

total serum cholesterol value or level or concentration

increase in antibody level

creatinine level or clearance

serum phosphorus concentration

increase in bilirubin level

platelet count

24-hour urine output or volume

antinuclear antibody titer

mean corpuscular volume

hemagglutination inhibition titer

high-density lipoprotein fraction

urinary placental growth factor concentration

urinary protein excretion

In reports of findings from clinical examinations or laboratory values, data may be enumerated without repeating value, level, etc, in accordance with the following example:

Laboratory studies disclosed the following values: alkaline phosphatase, 722 U/L; serum creatinine, 4 mg/dL; serum urea nitrogen, 148 mg/dL; γ-glutamyltransferase, 138 U/L; prothrombin time, 15.3 seconds; and partial thromboplastin time, 48.8 seconds. Immunoglobulin concentrations were normal except for IgA levels of 6.7 g/L and λ chain concentrations of 383 mg/dL.

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