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Tips for troublesome sample-size calculation

Article information

Korean J Anesthesiol. 2020;73(3):268-268
Publication date (electronic) : 2020 May 25
doi : https://doi.org/10.4097/kja.19497.e1
Junyong In1, Hyun Kang2, Jong Hae Kim3, Tae Kyun Kim4, Eun Jin Ahn5, Dong Kyu Lee6, Sangseok Lee7, Jae Hong Park8
1Department of Anesthesiology and Pain Medicine, Dongguk University Ilsan Hospital, Goyang, Korea
2Department of Anesthesiology and Pain Medicine, Chung-Ang University College of Medicine, Seoul, Korea
3Department of Anesthesiology and Pain Medicine, Daegu Catholic University School of Medicine, Daegu, Korea
4Department of Anesthesiology and Pain Medicine, Yangsan Hospital, Pusan National University School of Medicine, Busan, Korea
5Department of Anesthesiology and Pain Medicine, Inje University Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
6Department of Anesthesiology and Pain Medicine, Guro Hospital, Korea University School of Medicine, Seoul, Korea
7Department of Anesthesiology and Pain Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
8Department of Anesthesiology and Pain Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea

Korean Journal of Anesthesiology 2020; 73(2):114-120

https://doi.org/10.4097/kja.19497

 

The article by In J, et al. entitled, “Tips for troublesome sample-size calculation.” contained an error in the Equation 12.

 

Before correction:

(12) Adjusted sample size=Calculated sample size1-dropout rate=391-0.9=43.33

 

The correct information is found below:

(12) Adjusted sample size=Calculated sample size1-dropout rate=391-0.1=43.33

 

The value for dropout rate was incorrectly printed as 0.9. The value for dropout rate should be corrected to 0.1.

The authors apologize for any inconvenience this mistake may have caused.

Article information Continued

Copyright © The Korean Society of Anesthesiologists, 2020

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