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Exhaled hydrogen peroxide a potential biomarker for asthma?
Yao et al report a meta-analysis of 8 studies (n=728) measured hydrogen peroxide in exhaled breath condensate in asthmatics. Overall, concentration of H2O2 did distinguish asthmatics from non-asthmatics, and H2O2 levels correlated with worsening asthma control and with declining FEV1. CHEST 2011;140:108-116.