Psoriatic Arthritis — Medication Adherence in Psoriatic Arthritis
Citation(s)
Hromadkova L, Soukup T, Vlcek J Quality of life and drug compliance: their interrelationship in rheumatic patients. J Eval Clin Pract. 2015 Oct;21(5):919-24. doi: 10.1111/jep.12399. Epub 2015 Jun 17.
Tolu S, Rezvani A, Karacan I, Bugdayci D, Küçük HC, Bucak ÖF, Aydin T Self-Reported Medication Adherence in Patients With Ankylosing Spondylitis: The Role of Illness Perception and Medication Beliefs. Arch Rheumatol. 2020 Feb 7;35(4):495-505. doi: 10.46497/ArchRheumatol.2020.7732. eCollection 2020 Dec.
Self-Reported Medication Adherence in Patients With Psoriatic Arthritis: Influence of Illness Perception and Medication Beliefs
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.
