Summary: Observational Cross-Sectional Study

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This Observational cross-sectional study was performed on 76 asthmatic children with age between 8 and 15 years old who referred to the Department of Immunology and Allergy, Children Medical Center, Tehran/Iran during 2012-2013. The recruited patients were selected by consecutive sampling method. FENO was measured with a portable electrochemical analyzer and forced spirometry was performed according to American Thoracic Society. The ACT questionnaire was used and completed for all the patients. Results: Mean of FENO was 28.5±29.1 (ppb) and ACT score 19.8±3.6. Significant correlations were found between FENO and FEV1 ((r=0.232,p=0.049), FENO and MEF 25-75 ((r= -0.304,p=0.009). We found no significant correlation Between FENO and ACT score,

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