Figure 3. Percentage increase (IR %) of asthma-related visits to the ED for an increase of 10 µg/m3 of PM10 on the day of the visit (lag 0) or the previous 0 to 1 days (lag (0–1)) in each subgroup of children (aged 5 to 8 years old, 9 to 11 years old, 12 to 15 years old and 5 to 15 years old) during periods with and without Saharan dust intrusions.
Error bars represent 95% confidence intervals.