Calculations of withdrawal time (WT) should be based on colonoscopies where no intervention is performed. Inclusion of procedures with interventional maneuvers, such as polypectomy or biopsy, for estimation of WT can lead to measurement bias and affect the validity of the study.
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This record was last updated on 07/04/2016 and may not reflect the most current and accurate biomedical/scientific data available from NLM.
The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/23292564