Celebi D, Yilmaz E, Sahin ST, Baydur H The effect of music therapy during colonoscopy on pain, anxiety and patient comfort: A randomized controlled trial. Complement Ther Clin Pract. 2020 Feb;38:101084. doi: 10.1016/j.ctcp.2019.101084. Epub 2019 Dec 23.
Hudson BF, Ogden J, Whiteley MS Randomized controlled trial to compare the effect of simple distraction interventions on pain and anxiety experienced during conscious surgery. Eur J Pain. 2015 Nov;19(10):1447-55. doi: 10.1002/ejp.675. Epub 2015 Jan 30.
Karaveli Cakir S, Evirgen S The Effect of Virtual Reality on Pain and Anxiety During Colonoscopy: A Randomized Controlled Trial. Turk J Gastroenterol. 2021 May;32(5):451-457. doi: 10.5152/tjg.2021.191081.
Sorkpor SK, Johnson CM, Santa Maria DM, Miao H, Moore C, Ahn H The Effect of Music Listening on Pain in Adults Undergoing Colonoscopy: A Systematic Review and Meta-Analysis. J Perianesth Nurs. 2021 Oct;36(5):573-580.e1. doi: 10.1016/j.jopan.2020.12.012.
Three Distraction Methods for Pain Reduction During Colonoscopy: A Randomized Controlled Trial Evaluating the Effects on Pain and Anxiety
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.
