RT Book, Section A1 Guyatt, Gordon A1 Walter, Stephen D. A1 Cook, Deborah J. A1 Jaeschke, Roman A2 Guyatt, Gordon A2 Rennie, Drummond A2 Meade, Maureen O. A2 Cook, Deborah J. SR Print(0) ID 1183875897 T1 Confidence Intervals: Was the Single Study or Meta-analysis Large Enough? T2 Users' Guides to the Medical Literature: A Manual for Evidence-Based Clinical Practice, 3rd ed YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 978-0-07-179071-0 LK jamaevidence.mhmedical.com/content.aspx?aid=1183875897 RD 2024/10/06 AB In discussions of whether trials were large enough, you may have heard people refer to the power of the trial as the authors presented in their sample size calculations. Such discussions are complex and confusing. As we illustrate in this chapter, whether a trial or meta-analysis is large enough depends only on the confidence interval (CI).