Colonoscopy — Sensitivity of Fecal Immunochemical Test (FIT) for Colorectal Cancer (CRC) Screening
Citation(s)
Brenner H, Tao S Superior diagnostic performance of faecal immunochemical tests for haemoglobin in a head-to-head comparison with guaiac based faecal occult blood test among 2235 participants of screening colonoscopy. Eur J Cancer. 2013 Sep;49(14):3049-54. doi: 10.1016/j.ejca.2013.04.023. Epub 2013 May 22.
Drouillard A, Bouvier AM, Rollot F, Faivre J, Jooste V, Lepage C Conditional net survival: Relevant prognostic information for colorectal cancer survivors. A French population-based study. Dig Liver Dis. 2015 Jul;47(7):597-601. doi: 10.1016/j.dld.2015.03.013. Epub 2015 Mar 27.
Lee JK, Liles EG, Bent S, Levin TR, Corley DA Accuracy of fecal immunochemical tests for colorectal cancer: systematic review and meta-analysis. Ann Intern Med. 2014 Feb 4;160(3):171. doi: 10.7326/M13-1484. Review.
Tinmouth J, Lansdorp-Vogelaar I, Allison JE Faecal immunochemical tests versus guaiac faecal occult blood tests: what clinicians and colorectal cancer screening programme organisers need to know. Gut. 2015 Aug;64(8):1327-37. doi: 10.1136/gutjnl-2014-308074. Epub 2015 Jun 3. Review.
van de Veerdonk W, Hoeck S, Peeters M, Van Hal G, Francart J, De Brabander I Occurrence and characteristics of faecal immunochemical screen-detected cancers vs non-screen-detected cancers: Results from a Flemish colorectal cancer screening programme. United European Gastroenterol J. 2020 Mar;8(2):185-194. doi: 10.1177/2050640619882157. Epub 2019 Oct 3.
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.
