Ghana S, Hakimi S, Mirghafourvand M, Abbasalizadeh F, Behnampour N Randomized controlled trial of abdominal binders for postoperative pain, distress, and blood loss after cesarean delivery. Int J Gynaecol Obstet. 2017 Jun;137(3):271-276. doi: 10.1002/ijgo.12134. Epub 2017 Mar 28.
Gillier CM, Sparks JR, Kriner R, Anasti JN A randomized controlled trial of abdominal binders for the management of postoperative pain and distress after cesarean delivery. Int J Gynaecol Obstet. 2016 May;133(2):188-91. doi: 10.1016/j.ijgo.2015.08.026. Epub 2016 Jan 14.
Liddle SD, Pennick V Interventions for preventing and treating low-back and pelvic pain during pregnancy. Cochrane Database Syst Rev. 2015 Sep 30;2015(9):CD001139. doi: 10.1002/14651858.CD001139.pub4.
Mens JM, Damen L, Snijders CJ, Stam HJ The mechanical effect of a pelvic belt in patients with pregnancy-related pelvic pain. Clin Biomech (Bristol, Avon). 2006 Feb;21(2):122-7. doi: 10.1016/j.clinbiomech.2005.08.016. Epub 2005 Oct 7.
Vermani E, Mittal R, Weeks A Pelvic girdle pain and low back pain in pregnancy: a review. Pain Pract. 2010 Jan-Feb;10(1):60-71. doi: 10.1111/j.1533-2500.2009.00327.x. Epub 2010 Oct 26.
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.