Hunt D, Prather H, Harris Hayes M, Clohisy JC Clinical outcomes analysis of conservative and surgical treatment of patients with clinical indications of prearthritic, intra-articular hip disorders. PM R. 2012 Jul;4(7):479-87. doi: 10.1016/j.pmrj.2012.03.012. Epub 2012 May 16.
Prather H, Cheng A, Steger-May K, Maheshwari V, Van Dillen L Hip and Lumbar Spine Physical Examination Findings in People Presenting With Low Back Pain, With or Without Lower Extremity Pain. J Orthop Sports Phys Ther. 2017 Mar;47(3):163-172. doi: 10.2519/jospt.2017.6567. Epub 2017 Feb 3.
Prather H, Cheng A, Steger-May K, Maheshwari V, VanDillen L Association of Hip Radiograph Findings With Pain and Function in Patients Presenting With Low Back Pain. PM R. 2018 Jan;10(1):11-18. doi: 10.1016/j.pmrj.2017.06.003. Epub 2017 Jun 16.
Prather H, Creighton A, Sorenson C, Simpson S, Reese M, Hunt D, Rho M Anxiety and Insomnia in Young and Middle-Aged Adult Hip Pain Patients With and Without Femoroacetabular Impingement and Developmental Hip Dysplasia. PM R. 2018 May;10(5):455-461. doi: 10.1016/j.pmrj.2017.10.007. Epub 2017 Oct 27.
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.
