TY - JOUR
T1 - Confidence Interval Calculation Methods Are Infrequently Reported in Emergency-medicine Literature
AU - Marr, Amy
AU - Kurz, Michael
AU - Stern, Jessica
AU - Kulstad, Erik
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/1
Y1 - 2007/1
N2 - Background: There are many different confidence interval calculation methods, each providing different as well as in some cases inadequate interval estimates. Readers who know which method is used are better able to understand potentially significant limitations in study reports. Objectives: To quantify how often confidence interval calculation methods are disclosed by authors in four peer-reviewed North American emergency-medicine journals. Methods: The authors independently performed searches of four journals for all studies in which comparisons were made between means, medians, proportions, odds ratios, or relative risks. Case reports, editorials, subject reviews, and letters were excluded. Using a standardized abstraction form developed on a spreadsheet, the authors evaluated each article for the reporting of confidence intervals and evaluated the description of methodology used to calculate the confidence intervals. Results: A total of 212 articles met the inclusion criteria. Confidence intervals were reported in 123 articles (58%; 95% CI = 51% to 64%); of these, a description of methodology was reported in 12 (9.8%; 95% CI = 5.7% to 16%). Conclusions: Confidence interval methods of calculation are disclosed infrequently in emergency medicine literature.
AB - Background: There are many different confidence interval calculation methods, each providing different as well as in some cases inadequate interval estimates. Readers who know which method is used are better able to understand potentially significant limitations in study reports. Objectives: To quantify how often confidence interval calculation methods are disclosed by authors in four peer-reviewed North American emergency-medicine journals. Methods: The authors independently performed searches of four journals for all studies in which comparisons were made between means, medians, proportions, odds ratios, or relative risks. Case reports, editorials, subject reviews, and letters were excluded. Using a standardized abstraction form developed on a spreadsheet, the authors evaluated each article for the reporting of confidence intervals and evaluated the description of methodology used to calculate the confidence intervals. Results: A total of 212 articles met the inclusion criteria. Confidence intervals were reported in 123 articles (58%; 95% CI = 51% to 64%); of these, a description of methodology was reported in 12 (9.8%; 95% CI = 5.7% to 16%). Conclusions: Confidence interval methods of calculation are disclosed infrequently in emergency medicine literature.
KW - approximate methods
KW - confidence intervals
KW - exact method
KW - statistics
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U2 - 10.1197/j.aem.2006.07.014
DO - 10.1197/j.aem.2006.07.014
M3 - Article
C2 - 17099188
AN - SCOPUS:33845792923
SN - 1069-6563
VL - 14
SP - 74
EP - 76
JO - Academic Emergency Medicine
JF - Academic Emergency Medicine
IS - 1
ER -