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- W4365444369 abstract "Introduction Exercise‐induced bronchoconstriction (EIB) is not only highly prevalent in people with asthma, but can also occur independently, particularly in athletes. Fractional exhaled nitric oxide (FeNO) is an indirect biomarker of type 2 airway inflammation that has an established role in the assessment and management of asthma. The aim was to evaluate the value of FeNO in the assessment of EIB in athletes. Method Multicenter retrospective analysis. In total, 488 athletes (male: 76%) performed baseline FeNO, and spirometry pre‐ and post‐indirect bronchial provocation via eucapnic voluntary hyperpnea (EVH). Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated for established FeNO thresholds—that is, intermediate (≥25 ppb) and high FeNO (≥40 ppb and ≥ 50 ppb)—and were evaluated against objective evidence of EIB (≥10% fall in FEV 1 ). The diagnostic accuracy of FeNO was calculated using receiver operating characteristics area under the curve (ROC‐AUC). Results Thirty‐nine percent of the athletes had a post‐EVH fall in FEV 1 consistent with EIB. FeNO values ≥25 ppb, ≥40 ppb, and ≥ 50 ppb were observed in 42%, 23%, and 17% of the cohort, respectively. The sensitivity of FeNO ≥25 ppb was 55%, which decreased to 37% and 27% at ≥40 ppb and ≥ 50 ppb, respectively. The specificity of FeNO ≥25 ppb, ≥40 ppb, and ≥ 50 ppb was 66%, 86%, and 89%, respectively. The ROC‐AUC for FeNO was 0.656. Conclusions FeNO ≥40 ppb provides good specificity, that is, the ability to rule‐in a diagnosis of EIB. However, due to the poor sensitivity and predictive values, FeNO should not be employed as a replacement for indirect bronchial provocation in athletes." @default.
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- W4365444369 date "2023-04-13" @default.
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- W4365444369 title "Fractional exhaled nitric oxide in the assessment of exercise‐induced bronchoconstriction: A multicenter retrospective analysis of <scp>UK</scp>‐based athletes" @default.
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- W4365444369 doi "https://doi.org/10.1111/sms.14367" @default.
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