TY - CHAP
M1 - Book, Section
TI - What Determines the Width of the Confidence Interval?
A1 - Brożek, Jan
A1 - Falavigna, Maicon
A2 - Guyatt, Gordon
A2 - Rennie, Drummond
A2 - Meade, Maureen O.
A2 - Cook, Deborah J.
PY - 2015
T2 - Users' Guides to the Medical Literature: A Manual for Evidence-Based Clinical Practice, 3rd ed
AB - Clinicians sometimes equate the size of a study or the number of participants in a study with the width of the confidence interval (CI) and thus with its precision. This chapter deals with issues of precision and the resulting CIs associated with treatment effects on dichotomous (yes/no) outcomes, such as death, stroke, or myocardial infarction. As it turns out, for the relative measures of effect sizes (eg, relative risk [RR] or relative risk reduction [RRR]), the number of patients in a study is a secondary determinant of the width of a CI, with the primary determinant being the absolute number of events.
SN -
PB - McGraw-Hill Education
CY - New York, NY
Y2 - 2022/10/07
UR - jamaevidence.mhmedical.com/content.aspx?aid=1183876358
ER -