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ICU nutrition research: did the evidence get better? Remaining sources of bias

Ronald L Koretz1,2

  • 1Emeritus Professor Clinical Medicine, UCLA Medical Center Olive View, Sylmar, California.

Current Opinion in Clinical Nutrition and Metabolic Care
|November 8, 2024
PubMed

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Bias refers to any tendency that prevents a question from being considered unprejudiced. In research, bias occurs when one outcome or answer is selected or encouraged over others in sampling or testing. Bias can occur during any research phase, including study design, data collection, analysis, and publication.
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The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?
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