Table 2. Inclusion and exclusion criteria.

	Inclusion	Exclusion
Participants	Population exposed to sporting tournament	No sporting tournament
Exposure	Sporting tournament*	No sporting tournament
Comparison	Control population from immediate prior or future years (same time of the year) in same geographic region not exposed to sporting tournament	Study without this outcome
Outcome	Change in total births and/or sex ratio 9(±1) months later	Study without this outcome
Study design	Ecological	Letters, editorials, reviews, etc.
Language	All languages	Not applicable
Date	Inception of database	7 November 2022

Note:

^*Direct observation of the tournament or indirectly via the media.