3. Patients who demonstrated an increase of ≥12% and ≥200 mL in FEV1 over their pre-bronchodilator value 30 minutes after inhaling a total of 200 μg of salbutamol (or albuterol) via metered dose inhaler (MDI) (the reversibility test). Reversibility had to be demonstrated after an appropriate washout period of at least 6 hrs prior to the evaluation for a shortacting β2-agonist. The administration of salbutamol (or albuterol) for the reversibility test was to be within 30 minutes after pre-bronchodilator spirometry. Reversibility had to be demonstrated at Visit 1 or between Visits 1 and 2, in order for patients to be included in the trial.