Figure 4: Estimated associations of 3-day rolling mean ambient pollutant levels and ED visits by SCD genotype (among 5-mile buffer zone cohort).

Plot above shows results of 8 separate models (4 pollutants × 2 SCD types). Severe includes patients with HbSS, HbSβ0; moderate includes all other sickle cell disease variants, does not include sickle cell trait. Of note, analysis of 10- and 20-mile buffer zones showed similar, non-significant differences when grouping by genotype.