Improvement of Asthma Management in Actual Practice Consistent with Prevalence of Anti-inflammatory Agents-Based on Questionnaire Surveys in Niigata Prefecture, Japan from 1998 to 2002-

These results indicate that the prevalence of anti-inflammatory agents, including inhaled corticosteroids and leukotriene receptor antagonist, was associated with an adequate improvement in asthma control in clinical practice. In asthma management in clinical practice, prevalence of PEFM may play an important role in the improvement of asthma related emergent episodes or QOL.