Psoriasis — Canadian Assessment of Patient Outcomes and Effectiveness of Etanercept (Enbrel) in Psoriasis
Citation(s)
Vender R, Lynde C, Gilbert M, Ho V, Sapra S, Poulin-Costello M Etanercept improves quality of life outcomes and treatment satisfaction in patients with moderate to severe plaque psoriasis in clinical practice. J Cutan Med Surg. 2012 Nov-Dec;16(6):407-16.
Vender R, Lynde C, Gilbert M, Ho V, Sapra S, Poulin-Costello M One-year, multicenter, open-label, single-arm study evaluating the safety and effectiveness of etanercept for the treatment of moderate-to-severe plaque psoriasis in a Canadian population. J Cutan Med Surg. 2013 Mar-Apr;17(2):129-38.
Canadian Assessment of Patient Outcomes and Effectiveness of Enbrel (Etanercept) in Psoriasis
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
