There are other theories, of course. Even though air quality in general has improved, there are more people than ever living in urban settings where they're overly exposed to the allergens that commonly trigger asthma - cockroaches, dust mites, mold and secondhand smoke. Add to that the fact that children lead far more sedentary lives than they used to, and spend far more time indoors where they're exposed to allergens, and we can begin to see that one reason asthma is on the rise maybe because children are exposed to the allergens far more often these days.
While there's been a great deal of research on asthma and asthma medications over the past twenty years, there have been few new drugs developed for treatment. This is primarily due to the success of the current inhaler drugs. They work extremely well as long as they're used everyday as prescribed. However, because so many asthma sufferers tend to ignore their doctor's instructions, a major component of this new approach to treating asthma is to educate patients and families about what asthma is and how to prevent asthma attacks.
8 more days per year without any symptoms than those who were treated in the hospital, given a prescription, and sent on their way.