20 Oct 2017 --- Obesity has been found to be a risk factor for repeated hospital admissions among children in Japan hospitalized for asthma, researchers report in a Pediatric Allergy & Immunology study. Asthma and obesity are common chronic illnesses and public health problems for children in developed countries like Japan. The prevalence of asthma and obesity is increasing, and the study authors note that several studies reported an association between obesity and asthma in children.