Racine EF, Lyerly J, Troyer JL, Warren-Findlow J, McAuley WJ The influence of home-delivered dietary approaches to stop hypertension meals on body mass index, energy intake, and percent of energy needs consumed among older adults with hypertension and/or hyperlipidemia. J Acad Nutr Diet. 2012 Nov;112(11):1755-62. doi: 10.1016/j.jand.2012.06.358.
Troyer JL, Racine EF, Ngugi GW, McAuley WJ The effect of home-delivered Dietary Approach to Stop Hypertension (DASH) meals on the diets of older adults with cardiovascular disease. Am J Clin Nutr. 2010 May;91(5):1204-12. doi: 10.3945/ajcn.2009.28780. Epub 2010 Mar 3.
Wessler JD, Maurer MS, Hummel SL Evaluating the safety and efficacy of sodium-restricted/Dietary Approaches to Stop Hypertension diet after acute decompensated heart failure hospitalization: design and rationale for the Geriatric OUt of hospital Randomized MEal Trial in Heart Failure (GOURMET-HF). Am Heart J. 2015 Mar;169(3):342-348.e4. doi: 10.1016/j.ahj.2014.11.021. Epub 2015 Jan 7.
Effects of Home-delivered Low-sodium Meals in Older Adults Following Heart Failure Hospitalization.
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.
