Do open-access dermatology articles have higher citation counts than those with subscription-based access?

Background Open-access (OA) publishing is increasingly prevalent in dermatology, and many journals now offer hybrid options, including conventional (subscription-based access [SA]) publishing or OA (with an author publishing charge) in a subscription journal. OA publishing has been noted in many disciplines, but this has been rarely studied in dermatology. Methods Using the Clarivate Journal Citation Report, we compiled a list of English-language dermatology hybrid OA journals containing more than 5% OA articles. We sampled any OA review or original research article in 4 issues from 2018 to 2019 and matched an equal number of SA articles. Citation count, citation count excluding self-citations and view counts found using Scopus and Altmetrics score were recorded for each article. Statistical analyses were performed using logistic and negative binomial models using R software. Results Twenty-seven hybrid dermatology journals were found, and 538 articles were sampled (269 OA, 269 SA). For both original research and review articles, OA articles had significantly higher mean citation counts (mean 13.2, standard deviation [SD] 17.0) compared to SA articles (mean 7.9, SD 8.8) (odds ratio [OR] 1.04; 95% CI 1.02–1.05; P < .001) including when adjusted for time from publication. Original research OA articles had significantly higher citation counts than original research SA articles (excluding self-citations; OR, 1.03; 95% CI, 1.01–1.05; P = .003), and review articles also had OA citation advantage than review SA articles (OR, 1.06; 95% CI, 1.02–1.11; P = .008). There was, however, no significant difference in citation counts between review articles and original research articles (OR, 1.00; 95% CI, 0.19–5.31; P = 1.000). There was no significant difference seen in view counts (OA: mean±SD 17.7±10.8; SA: mean±SD 17.1±12.4) and Altmetric score (OA: mean±SD 13.2±47.8; SA: mean±SD 6.3 ±25.0) between OA and SA articles. Potential confounders included the fact that more OA articles were published in Europe than in Asia, and pharmaceutical-funded articles were more likely to be published OA. Conclusions We noted a higher citation count for OA articles than SA articles in dermatology hybrid journals. However, dermatology researchers should take into account confounding factors when deciding whether to increase the impact of their work by selecting OA over SA publishing.