The burden of asthma with specific reference to the United States.

摘要: During the second half of 20th century, increasing prevalence, morbidity, economic burden, and, in some countries, mortality from asthma have generated worldwide concern. The prevalence United States and other English-speaking countries is higher than that most but variations cannot be explained by current knowledge recognized risk or protective factors. According to hospital admission rates, morbidity rates also risen throughout world during past 40 years. These trends are likely due many different factors, including an increase severe asthma. Asthma gradually declined 1960s 1970s exhibited a substantial, progressive 20 This trend stands contrast those western where generally been decreasing 1990s. In both developing considerable burden disproportionately affects individuals with disease. observation illustrates potential for reducing costs associated through management approaches proven reduce mortality.