Values indicate regression coefficients (95% confidence intervals) andP values from univariate linear regression analyses. Statistically significant correlations are marked bold and also indicated as follows: *p <0.05; **p<0.01; ***p <0.001; otherwise non-significant (p >0.05). †Variable log-transformed. Abbreviations: BMI, body mass index; FeNO, fractional exhaled nitric oxide; post-BD, post-bronchodilator; OCS, oral corticosteroids