Austin J, McKellar JD, Moos R The influence of co-occurring axis I disorders on treatment utilization and outcome in homeless patients with substance use disorders. Addict Behav. 2011 Sep;36(9):941-4. doi: 10.1016/j.addbeh.2011.05.001. Epub 2011 May 7.
McKellar J, Wagner T, Harris A, Oehlert M, Buckley S, Moos R One-year outcomes of telephone case monitoring for patients with substance use disorder. Addict Behav. 2012 Oct;37(10):1069-74. doi: 10.1016/j.addbeh.2012.03.009. Epub 2012 Mar 13.
Oser M, Cucciare M, McKellar J, Weingardt K Correlates of hazardous drinking among Veterans with and without hepatitis C. J Behav Med. 2012 Dec;35(6):634-41. doi: 10.1007/s10865-011-9394-9. Epub 2012 Jan 11.
Oser ML, McKellar J, Moos BS, Moos RH Changes in ambivalence mediate the relation between entering treatment and change in alcohol use and problems. Addict Behav. 2010 Apr;35(4):367-9. doi: 10.1016/j.addbeh.2009.10.024. Epub 2009 Oct 30.
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.
