Prevalence and assosiated factors of airway hyperresponsiveness in children with recurrent chronic cough

Background Airway hyper-responsiveeness (AH) is a common char- AH is commonly referred as "cough variant asthma ". Histamine provocation test should be performed to determine whether a patient has "cough variant asthma " or recurrent viral bronchitis. Objective to determine AH prevalence in children with recurrent chronic cough and factors associated with it.