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Medical Term:


Pronunciation: bī′-as


  1. Systematic discrepancy between a measurement and the true value; may be constant or proportionate and may adversely affect test results.
  2. Any trend in the collection, analysis, interpretation, publication, or review of data that can lead to conclusions that differ systematically from the truth; deviation of results or inferences from the truth, or processes leading to deviation.

[Fr. biais, obliquity, perh. fr. L. bifax, two-faced]

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