In a nonblind , pragmatic , cluster-randomized trial in primary care , adults ( 18-50 years of age ) with a doctor 's diagnosis of asthma who were prescribed inhaled corticosteroids were allocated to one of 3 treatment strategies : ( 1 ) aiming at PCa ( Asthma Control Questionnaire [ ACQ ] score < 1.50 ) ; ( 2 ) aiming at Ca ( ACQ score < 0.75 ) ; and ( 3 ) aiming at FCa ( ACQ score < 0.75 and Feno value < 25 ppb ) .