Strategies to Improve Asthma and Treatment of Asthma in Canadians
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government.
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Our study will enroll 644 randomly-selected Canadians who have been diagnosed with asthma by a physician within the previous five years. It will be determined what diagnostic tests were initially performed to make this diagnosis. Participants will undergo lung function testing over 6-8 weeks to determine their respiratory status and to confirm they have asthma. Participants may be followed up to one year depending on their test results.
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study:
18 Years to 100 Years (Adult, Senior)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Canadians diagnosed with Asthma and 18 years of age and older.
Patient must have a recent diagnosis of asthma by a physician. Diagnosis of asthma must have occurred within 5 years prior to entry into the study.
Patient must be at least 18 years old.
Patients in whom methacholine challenge is contraindicated
Patients using chronic oral prednisone.
Patients with heart attack or stroke within three previous months, and those with known aortic or cerebral aneurysms.
Pregnant patients (unknown effect of methacholine on the fetus) and breastfeeding patients (unknown whether methacholine is excreted in breast milk).
Patients unable to provide informed consent.
Patients not able to perform spirometry and/or methacholine challenge testing.
Patients who have a greater than 10 pack-year smoking history (this will exclude patients with possible COPD).
Patients who currently have active pulmonary Tuberculosis
Patients who have had eye surgery in the past 3 months or who have a detached retina
Patients involved in another interventional asthma study