The relationship between union membership and self-rated health among racially diverse US healthcare workers: The role of control over work schedules and locations

Background: Labor unions are associated with better wages, improved working conditions, and greater worker empowerment, which may result in better health. However, less is known about the relationship between unionization and health among U.S. healthcare workers, whether the relationship differs among racially diverse workers, and how much control over workplace schedules and location mediates the relationship. Methods: We analyzed a cross-sectional survey of a nationally representative sample of 3000 U.S. healthcare workers collected from March 14 through April 5, 2023. Using ordinal logistic regression, we evaluated whether unionized healthcare workers had better self-rated health (SRH) than their nonunionized counterparts and examined potential differences between White and racially minoritized respondents. We quantified the mediation percentage explained by control over one's schedule and workplace location in the total and stratified samples using Karlson, Holm, and Breen decomposition analysis. Results: Over a third (36.1%) of racially minoritized respondents were unionized, compared to 22.3% of White respondents. Among racially minoritized workers, a greater share of unionized workers reported excellent health (40.6% vs. 21.8%) than their nonunionized counterparts. In confounder-adjusted ordinal logistic regression analyses, labor union membership was associated with better SRH overall, with a stronger association for racially minoritized workers. Among White healthcare workers, control over workplace arrangements explained 68.1% of the union membership and SRH relationship. For racially minoritized workers, control over workplace arrangements partially mediated the relationship, explaining 17.4% of the variation, suggesting that labor unions may impact health through additional pathways for these workers. Conclusions: This study provides empirical evidence of the relationship between labor union membership and health among U.S. healthcare workers. We demonstrate that control over schedules and location is an important mechanism by which unionization may protect healthcare workers' health. Among racially diverse healthcare workers, labor unions may play an important role in health through various pathways beyond workplace control.