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Selection Bias

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Definition: The introduction of error due to systematic differences in the characteristics between those selected and those not selected for a given study. In sampling bias, error is the result of failure to ensure that all members of the reference population have a known chance of selection in the sample.  IM GEN only; coord NIM with disease /epidemiol (IM) or specific non-disease term /statist; no qualif; specify geog if pertinent    Other names Sampling Bias; Bias, Selection; Sampling Errors; Errors, Sampling; Error, Sampling; Biases, Selection; Biases, Sampling; Bias, Sampling; Selection Biases; Sampling Error; Sampling Biases

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Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
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