Sitorus, R.K., Nurmaini and Taufik Ashar 2025. Individual Characteristics and Particulate Matter Exposure Associated with Lung Function Impairment Among Online Taxi-bike Drivers in Medan City. International Journal of Health, Education & Social (IJHES). 8, 5 (May 2025). DOI:https://doi.org/10.1234/ijhes.v8i4.366.