EA Mitchell, R Beasley, B Bjorksten, J Crane, L Garcia-Marcos, U Keil; ISAAC Phase Three Study Group. Clin Exp Allergy. 2013;43(1):73–84 To determine if a relationship exists between body mass index (BMI), vigorous physical activity, and television viewing, with symptoms of eczema, rhinoconjunctivitis, and asthma. Data from 76 164 children aged 6 to 7 years (29 centers; 17 countries) and 201 370 adolescents aged 13 to 14 years (73 centers; 35 countries) was analyzed as part of the International Study of Asthma and Allergies in Childhood (ISAAC) Phase III study, a multicenter, multicountry, cross-sectional population chosen from a random …