| Autor: |
Howlett-Downing C; School of Health Systems and Public Health, Faculty of Health Sciences, University of Pretoria, Gezina, South Africa., Boman J; Department of Chemistry and Molecular Biology, Atmospheric Science Division, University of Gothenburg, Göteborg, Sweden., Molnár P; Department of Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden., Shirinde J; School of Health Systems and Public Health, Faculty of Health Sciences, University of Pretoria, Gezina, South Africa., Wichmann J; School of Health Systems and Public Health, Faculty of Health Sciences, University of Pretoria, Gezina, South Africa. |
| Abstrakt: |
Outdoor PM 2.5 was sampled in Pretoria, 18 April 2017 to 28 February 2020. A case-crossover epidemiology study was associated for increased PM 2.5 and trace elements with increased hospital admissions for respiratory disorders (J00-J99). The results included a significant increase in hospital admissions, with total PM 2.5 of 2.7% (95% CI: 0.6, 4.9) per 10 µg·m -3 increase. For the trace elements, Ca of 4.0% (95% CI: 1.4%-6.8%), Cl of 0.7% (95% CI: 0.0%-1.4%), Fe of 3.3% (95% CI: 0.5%-6.1%), K of 1.8% (95% CI: 0.2-3.5) and Si of 1.3% (95% CI: 0.1%-2.5%). When controlling for PM 2.5 , only Ca of 3.2% (95% CI: 0.3, 6.1) and within the 0-14 age group by 5.2% (95% CI: 1.5, 9.1). Controlling for a co-pollutant that is highly correlated with PM2.5 does reduce overestimation, but further studies should include deposition rates and parallel sampling analysis. |
