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- W4226283255 abstract "(1) Background: Several recent studies on the clinical value of spirometry indexes demonstrated high sensitivity of FEF25-75 as a marker of bronchial obstruction in asthmatics with normal baseline spirometry. Our study aims to evaluate the clinical value of maximal mid-expiratory flow in children with asthma. (2) Methods: For two years, 257 children were included - 211 with asthma and 46 healthy controls. Pre- and post-bronchodilator spirometry, atopic status determination and asthma control assessment were performed. (3) Results: The small airway obstruction (SAO) group (FEV1≥80%, ММEF25/75<65%) demonstrated significantly lower values for FEV1, FEV1/FVC, PEFR, МMMF25/75 and a significant higher bronchodilator response (BDR, ΔFEV1% init. ≥12%) compared to normal baseline spirometry group (FEV1>80%, MMEF25/75≥65%) (Р<0.0001). In addition, we found a statistically significant difference in FEF25-75/FVC median between asthmatics and healthy controls (Р<0.0001) regardless of the FEV1 value. Children with SAO have a 2.338-fold higher risk of poor asthma outcome (OR 95% CI [1.077-5.294]) and a 6.171-fold (OR 95% CI [2.523-15.096]) greater probability of demonstrating positive BDR, compared to children with normal baseline spirometry. MMEF25/75 was found to be a good predictor for positive BDR with AUC 0.843 (CI 0.781-0.845) and a best cut-off value of 58.1% (77.8% sensitivity and 78.8% specificity). (4) Conclusion: Our results confirmed that a small but substantial group of asthmatic children with normal baseline FEV1 and low MMEF25-75 are at higher risk for poor asthma outcomes." @default.
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- W4226283255 date "2022-01-01" @default.
- W4226283255 modified "2023-09-23" @default.
- W4226283255 title "MMEF25-75 may predict significant BDR and future risk of exacerbations in asthmatic children with normal baseline FEV1." @default.
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