Educational note: Paradoxical collider effect in the analysis of non-communicable disease epidemiological data: a reproducible illustration and web application.

The corrigendum to this article published on 10 December 2019 (https://doi.org/10.1093/ije/dyz247) referred to corrections made to the code in Box 2. These corrections were in fact, incorrect, as was the sentence referring to Box 2. The correct text and Box 2 code is as follows (changes shown in bold). “The true causal coefficient of the exposure A is 0.3, and the coefficients for the association of the collider C with the exposure A and the outcome Y are 1.2 and 0.9, respectively (Box 2).”