Correction to: Trials 22, 956 (2021)

https://doi.org/10.1186/s13063-021-05943-w

Following the publication of the original article [1], we were notified of an error in the statistical analysis section. In line 555, in the sentence that begins with: “Planned subgroup analyses include by age group ( …)” , the age categories (i.e., 10–14, 15–19, and 20–24) incorrectly appeared as citations in the published article.

The original article has been corrected.