Correlation between bronchial dilation test and asthma control level in children with asthma

Abstract

OBJECTIVE To study the correlation between the bronchial dilation test (BDT) and asthma control level in children with asthma. METHODS A total of 153 children with asthma, aged 5-14 years, who attended the outpatient service from March 2016 to March 2018 were enrolled. According to the presence or absence of atopic constitution, they were divided into an allergic group with 79 children and a non-allergic group with 74 children. The correlation between BDT and Childhood Asthma Control Test (C-ACT) scores was analyzed for both groups. RESULTS All basic pulmonary function parameters were positively correlated with C-ACT scores in the non-allergic group (P < 0.05). Except the forced vital capacity, peak expiratory flow and maximal expiratory flow at 25% vital capacity in percent predicted values, the other pulmonary function parameters were positively correlated with C-ACT scores in the allergic group (P < 0.05). The improvement rates of all BDT parameters (except maximal expiratory flow at 25% vital capacity in the allergic group and maximal expiratory flow at 50% vital capacity in the non-allergic group) were negatively correlated with C-ACT scores in the two groups (P < 0.05). CONCLUSIONS The improvement rate of BDT is well correlated with C-ACT scores in children with asthma, suggesting that BDT can be used as an index for predicting asthma control level.