Brytek-Matera A, Czepczor-Bernat K, Olejniczak D Food-related behaviours among individuals with overweight/obesity and normal body weight. Nutr J. 2018 Oct 16;17(1):93. doi: 10.1186/s12937-018-0401-7.
Coulman KD, MacKichan F, Blazeby JM, Owen-Smith A Patient experiences of outcomes of bariatric surgery: a systematic review and qualitative synthesis. Obes Rev. 2017 May;18(5):547-559. doi: 10.1111/obr.12518. Epub 2017 Mar 8.
Karlsson J, Taft C, Ryden A, Sjostrom L, Sullivan M Ten-year trends in health-related quality of life after surgical and conventional treatment for severe obesity: the SOS intervention study. Int J Obes (Lond). 2007 Aug;31(8):1248-61. doi: 10.1038/sj.ijo.0803573. Epub 2007 Mar 13.
Maphis LE, Martz DM, Bergman SS, Curtin LA, Webb RM Body size dissatisfaction and avoidance behavior: how gender, age, ethnicity, and relative clothing size predict what some won't try. Body Image. 2013 Jun;10(3):361-8. doi: 10.1016/j.bodyim.2013.02.003. Epub 2013 Mar 27.
Uchino BN Social support and health: a review of physiological processes potentially underlying links to disease outcomes. J Behav Med. 2006 Aug;29(4):377-87. doi: 10.1007/s10865-006-9056-5. Epub 2006 Jun 7.
Umberson D, Montez JK Social relationships and health: a flashpoint for health policy. J Health Soc Behav. 2010;51 Suppl(Suppl):S54-66. doi: 10.1177/0022146510383501.
How Gastric Bypass and Sleeve Gastrectomy Change Social Experiences and Biomarkers of Well-being
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.
