Hidayat, A. et al. 2026. Profitability Behind Safety: An Analysis of the Correlation between Investment in Personal Protective Equipment (PPE) and Operational Efficiency and Nursing Staff Productivity. Indonesian Journal of Global Health Research. 8, 2 (Apr. 2026), 1093–1100. DOI:https://doi.org/10.37287/ijghr.v8i2.1868.