Regarding the article by Mathur MB1 et al. in the January 2018 issue of Epidemiology, an error was discovered in the following equations in the last two rows of the table on page e5 after the issue was published.
The equations were mistakenly published as:
The correct equations are:
1. Mathur MB, VanderWeele TJ. R Function for additive interaction measures. Epidemiology. 2018;29(1):e5–e6.