All citations categorization and data extraction procedures are conducted in duplicate and disagreements are resolved by consensus. Our data is publicly available for all of our processes. For the report displayed on this specific page, you can consult the original data here.
For our purposes, articles categorized as Others are all unique citations that do not belong in any other category. Examples of this can be (but are not restricted to) observational studies, systematic reviews without meta-analysis, editorials and corrigendums. For the American Journal of Sports Medicine specifically, this category included a number of case reports/case series and cross-sectional studies.
See here the journal summary card in PDF.