The results of multinomial logistic regression analysis with PR/CRS as the reference class are reported in Table II in terms of odds ratios. The GERD class was characterized by low risk of having atopy and BHR, the UNEX class by low risk of atopy, and both the asthma/CC+ and asthma/CC− classes by increased risk of BHR. The asthma/CC− control class was characterized by low risk of LHR.