Abstract
Prevalence rate of intractable asthma was studied among the patients of members of the Japanese Society of Pediatric Allergy and Clinical Immunology and hospitals of medical school in October 2005. The information of seven hundreds and fifty two hospitals and private clinics was studied. The oral steroid dependent asthma patients were 0.07% in hospitals and 0.04% in private clinics. The patients needed more inhaled corticosteroid than usual uses were 1.52% in hospitals and 0.75% in private clinics except the oral steroid dependent asthma. The patients frequently admitted hospital and needed intravenous steroid more than 5mg/kg/day in predonisolone were 0.57% in hospitals and 0.12% in private clinics except the former two categories.
