Tips for troublesome sample-size calculation (vol 73, pg 114, 2020)

초록

The article by In J, et al. entitled, “Tips for troublesome sample-size calculation.” contained an error in the Equation 12. Before correction: (Formula Presented) 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. © The Korean Society of Anesthesiologists, 2020.