Reference Range is typically derived from measurements in which population?

Reference Range is typically derived from measurements in which population?

• A. Diseased patients
• B. Healthy individuals free of disease
• C. Hospital inpatients
• D. Adolescents only

Answer: (B)

Reference ranges represent what is typical for a biomarker in people without disease. They’re created by measuring the biomarker in a large group of healthy, disease-free individuals and defining the central portion of that distribution (often about the middle 95%) as the normal interval. This makes the range a baseline to interpret patient results and flag values outside the usual healthy variation. Using data from diseased patients, hospital inpatients, or a restricted group like adolescents would shift or limit the range and make it less applicable to general health assessments. So the standard source for a reference range is measurements from healthy individuals free of disease, often with adjustments for age, sex, and lab method as needed.

Reference ranges represent what is typical for a biomarker in people without disease. They’re created by measuring the biomarker in a large group of healthy, disease-free individuals and defining the central portion of that distribution (often about the middle 95%) as the normal interval. This makes the range a baseline to interpret patient results and flag values outside the usual healthy variation. Using data from diseased patients, hospital inpatients, or a restricted group like adolescents would shift or limit the range and make it less applicable to general health assessments. So the standard source for a reference range is measurements from healthy individuals free of disease, often with adjustments for age, sex, and lab method as needed.