Association between air pollutants and blood cell counts in pediatric patients with asthma: a retrospective observational study

Abstract Background Asthma is a common respiratory disease in children, and air pollution is a risk factor for pediatric asthma. However, how air pollution affects blood cells in pediatric patients with asthma remains unclear. Methods This retrospective observational study, performed in 2007–2018 at a medical center, enrolled non-trauma patients aged