Associations of particulate matter and its components with emergency room visits for cardiovascular and respiratory diseases - Fig 2 HwangSung-Hee LeeJae Young YiSeung-Muk KimHo 2017 <p><b>The relative risks (RRs) of cardiovascular disease per one-interquartile range increase in elemental carbon (EC) (A) or organic carbon (OC) (B) for each age group and sex on lag 0 day.</b> CI: confidence interval.</p>