The purpose of this study is to determine the percentage of patients who has reached the GINA guideline of asthma treatment after receiving any inhaled corticosteroid for 3 months or longer in actual clinical practice. Such percentage for each level of severity - mild, moderate and severe persistent asthma as well as the differences of these rates will also be explored.

Inclusion Criteria:

• Established persistent asthma
• Currently treated with any inhaled corticosteroid therapy but not SYMBICORT nor SERETIDE for 3 months or longer

Exclusion Criteria:

• Currently participating or have participated in a study with an investigational compound within the last 30 days
• Current diagnosis of chronic obstructive pulmonary disease (COPD)
• Smoked more than 10 packs a year

Patient aged 12 years and older who established persistent asthma and currently treated with any inhaled corticosteroid for 3 months or longer.