Seligman HK, Bolger AF, Guzman D, López A, Bibbins-Domingo K Exhaustion of food budgets at month's end and hospital admissions for hypoglycemia. Health Aff (Millwood). 2014 Jan;33(1):116-23. doi: 10.1377/hlthaff.2013.0096. Erratum in: Health Aff (Millwood). 2014 Jul;33(7):1304.
White JS, Basu S Does the benefits schedule of cash assistance programs affect the purchase of temptation goods? Evidence from Peru. J Health Econ. 2016 Mar;46:70-89. doi: 10.1016/j.jhealeco.2016.01.005. Epub 2016 Jan 29.
Whittle HJ, Palar K, Hufstedler LL, Seligman HK, Frongillo EA, Weiser SD Food insecurity, chronic illness, and gentrification in the San Francisco Bay Area: An example of structural violence in United States public policy. Soc Sci Med. 2015 Oct;143:154-61. doi: 10.1016/j.socscimed.2015.08.027. Epub 2015 Aug 20.
Coupons for Healthy Intake Using Variable Economic Strategies (CHIVES)
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.
