Editorial diversity correlates with journal impact factor and author diversity in cardiothoracic surgery.

Introduction: While there are no widely accepted diversity, equity, and inclusion (DEI) metrics for journals, geographic and sex diversity across a journal's editorial board may provide a surrogate measure of its commitment to DEI. We explored the association between journal quality and DEI metrics for cardiothoracic surgery (CTS) journals and investigated whether editorial diversity correlates with diversity across published articles.

Methods: We collected the following data for 30 CTS journals: country of publication (categorized by income level), journal quality metrics (citation-based metrics, e.g., impact factor (IF) or H-index), and sex and geographic representation across editorial boards and published articles. Bivariate correlations between numeric variables were assessed using Spearman's correlation.

Results: Female representation across editorial boards was 12.1%. Most editorial board members belonged to the United States (35.2%), with only 7.4% from the lower-middle-income countries and 0% from low-income countries. IF showed a strong positive correlation with female editorial representation (r = 0.70) but an inverse correlation with low- and middle-income countries (LMICs) editorial representation (r = -0.45). Female editorial representation demonstrated a significant positive correlation with female first authorship (r = 0.45), whereas LMIC editorial representation correlated strongly with LMIC corresponding authorship (r = 0.85).

Conclusion: Women and researchers from LMICs are in the minority across editorial boards of CTS journals. However, a strong correlation between journal H-index and female editorial representation indicates that top-ranked journals are spearheading efforts to improve equitable sex-based and gender representations. Similar efforts are required to ensure more global geographic representation across editorial boards and top-ranked CTS journals are the best placed to lead by example.