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Dictionary of Cancer Terms

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Normal range (NOR-mul RAYNJ)
In medicine, a set of values that a doctor uses to interpret a patient’s test results. The normal range for a given test is based on test results for 95% of the healthy population. Sometimes patients whose test results are outside of the normal range may be healthy, and some patients whose test results are within the normal range may have a health problem. The normal range for a test may be different for different groups of people (for example, men and women). Also called reference interval, reference range, and reference values.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.