The aim of the study is to compare the efficacy of ciclesonide versus fixed combination of fluticasone propionate/salmeterol versus placebo, on long-term asthma control in patients with mild persistent asthma. The study duration consists of a baseline period (2 weeks) and a treatment period (12 months). The study will provide further data on safety and tolerability of ciclesonide.

Main Inclusion Criteria:

• Clinical diagnosis of mild persistent asthma
• Pre-treatment with SABAs only
• FEV1 ≥80% predicted
• Good health with the exception of asthma

Main Exclusion Criteria:

• Concomitant severe diseases or diseases which are contraindications for the use of inhaled steroids
• COPD (chronic bronchitis or emphysema) and/or other relevant lung diseases causing alternating impairment in pulmonary function
• Pregnancy
• Intention to become pregnant during the course of the study
• Breast feeding
• Lack of safe contraception
• Current smokers ≥10 pack-years and ex-smokers with ≥10 pack-years