Fig. 3

Familiarity with Air Quality Index by Respiratory Disease Status and Healthcare Provider Intervention. Graph shows percent of total respondents in each category that were familiar with the air quality index. Error bars show standard error. Four groups are compared, separated by those with (+) and without (−) a respiratory disease themselves or in a member of their household, and by those whose healthcare providers have (+) or have not (−) provided them with information about the risks of air quality. The brackets indicate significant differences between groups, labeled with their corresponding p-values