['The results of studies on the associations of childhood excessive weight/obesity and physical activity with atopic sensitization and atopic diseases are inconsistent. We studied the associations of anthropometry and physical activity in childhood with atopic sensitization and atopic diseases in late childhood.', 'In a cohort study including cases exposed to preeclampsia during pregnancy and controls, anthropometry and physical activity were assessed at several ages in 617 children. Associations with atopic sensitization and atopic diseases in late childhood were analysed using multiple logistic regression.', 'Body mass index standard deviation score (BMI SDS) at 1\xa0year and low physical activity at 3-6\xa0years were positively associated with atopic sensitization at 12.8\xa0years [adjusted odds ratio (OR) 1.22; 95\xa0% confidence interval (1.00, 1.49) and OR 2.36; (1.15, 4.81), respectively]. Change in BMI SDS from 1 to 4\xa0years, BMI SDS at 4\xa0years, and high physical activity at 6-10\xa0years were positively associated with atopic dermatitis by 10.8\xa0years [OR 1.46; (1.11, 1.92); OR 1.32; (1.06, 1.65) and OR 1.94; (1.16, 3.24); respectively]. Low physical activity at 3-6 and 6-10\xa0years were positively associated with asthma by 10.8\xa0years [OR 3.61; (1.56, 8.36) and OR 2.52; (1.24, 5.12), respectively].'] Are body mass index and physical activity in early childhood associated with atopic sensitization , atopic dermatitis and asthma in later childhood?