Erratum Planning Study Size Based on Precision Rather Than PowerEpidemiology: January 2019 - Volume 30 - Issue 1 - p e1 doi: 10.1097/EDE.0000000000000924 Erratum Free Article OutlineOutline Article MetricsMetrics REFERENCE Supplemental Digital Content With regard to the article by Rothman KJ1 et al. in the September issue of Epidemiology, the authors are grateful to a reader for pointing out a mistake in the standard error formula for log of risk ratio that appeared in the table found in the supplemental digital content. A revised table has been uploaded with the corrected formula to: http://links.lww.com/EDE/B375.Back to Top | Article Outline REFERENCE 1. Rothman KJ, Greenland S. Planning study size based on precision rather than power. Epidemiology. 2018;29(5):599–603. Cited Here... Supplemental Digital Content EDE_29_5_2018_06_06_ROTHMAN_17-0891_SDC1.pdf; [PDF] (54 KB) Back to Top | Article OutlineCopyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.