Spirometry and bronchodilator responsiveness in wheezing preschool children

Methods We carried out a retrospective analysis of incentive spirometry tests in recurrent wheezing children, aged 2-5 years, from our center, performed between September 2012 and March 2014. Lung function was assessed before and after 400 mg of inhaled salbutamol using a Jaeger spirometer v.4.65 (CareFusion). Wheezing symptoms, parental asthma, prematurity, passive smoking exposure, atopy and controller medication use were evaluated. Categorical frequency analysis and non-parametric tests were used.