Data Underlying "Is the open access citation advantage real? A systematic review of the citation of open access and subscription-based articles"

This data underlies a systematic review project: "Is the Open Access Citation Advantage Real?" This project considers whether materials that are published open access receive a greater number of citations than materials published in subscription-based resources. The data here are extracted from 134 relevant studies. The data also include a risk of bias assessment that considers the methodological quality and flaws of the included studies.