The predictive value of impulse oscillometry for asthma exacerbations in
childhood: a systematic review and meta-analyses
Abstract
Background: Several studies have explored the predictive value of
impulse oscillometry (IOS) for asthma exacerbations in childhood, but
its specific parameters are still unclear. Therefore, we designed this
meta-analysis to determine the related indicators of acute asthma
attacks. Methods: A comprehensive literature search was performed in
July 2020 based on Pubmed, Embase, and Web of science database. Weighted
mean differences (WMD) were calculated using Fixed-or random-effects
models. Results: A total of 615 patients from 6 trials were included in
this analysis. IOS may be a useful tool to predict asthma exacerbations.
And the results showed that R5 (WMD = − 1.21, 95%CI: −1.55 to −0.87,
P<0.001), Fres (WMD = − 1.34, 95%CI: −2.03 to −0.65,P=0.018) and AX
(WMD = − 7.35, 95%CI: −9.94 to −4.76,P<0.001) had significant
correlation with asthma exacerbations. In addition, X5 may also predict
the acute attack of asthma (WMD =0.81, 95%CI: 0.56 to 1.01, P<0.001).
Conclusion: R5, AX, Fres, and X5 may be able to identify the risk of an
acute attack of asthma. Besides, our research further demonstrated that
peripheral airway injury may play an important role in the acute attack
of asthma.