Figure. Comparison of the plasma levels of LTE4 (A) and PGF2α, (B) and LTE4/PGF2α ratio according to the presence of previous AE (C). The plasma LTE4 level and LTE4/PGF2α ratio were significantly higher in group 1 than in group 2 (P=0.023 and P=0.010, respectively). Data were analyzed by general linear regression analysis adjusted for age, gender, and type of anti-asthmatics treatment. Group 1: patients who experienced AE for previous 12 weeks, Group 2: patients who that did not experience AE for previous 12 weeks. AE, asthma exacerbation; LTE4, leukotriene E4; PGF2α, prostaglandin F2α.
