Prevalence of allergic diseases of schoolchildren in central taiwan. From ISAAC surveys 5 years apart.

The prevalence of allergic disorders is increasing around the world. This study used the standardized written questionnaire from International Study of Asthma and Allergies in Childhood (ISAAC, phase III) to collect two cross-sectional appraisals of schoolchildren 5 years apart-one performed 2002 and another on 2007, to focus on the secular trends in prevalence of allergies in central Taiwan. This questionnaire was administered to schoolchildren from over 46 schools across Changhwa County in 2002, and again in 2007.