Lee WY, et al. - Among 441 patients with stable asthma enrolled in the Korean Childhood Asthma Study, researchers investigated if objective findings such as lung function, fractional exhaled nitric oxide (FeNO) and laboratory data were reflected by asthma control test (ACT). The controlled asthma group showed significantly higher forced expiratory volume in one second (FEV₁), forced expiratory flow between 25% and 75% of forced vital capacity and FEV₁/forced vital capacity on spirometry. Also, controlled asthma group had significantly lower FeNO and percent-change in FEV₁. Overall, they concluded that ACT has utility as part of the routine evaluation of asthmatic children and its use as a complement to existing tools was recommended.