Aronoff S, Rosenblatt S, Braithwaite S, Egan JW, Mathisen AL, Schneider RL Pioglitazone hydrochloride monotherapy improves glycemic control in the treatment of patients with type 2 diabetes: a 6-month randomized placebo-controlled dose-response study. The Pioglitazone 001 Study Group. Diabetes Care. 2000 Nov;23(11):1605-11. doi: 10.2337/diacare.23.11.1605.
Bril F, Cusi K Management of Nonalcoholic Fatty Liver Disease in Patients With Type 2 Diabetes: A Call to Action. Diabetes Care. 2017 Mar;40(3):419-430. doi: 10.2337/dc16-1787.
Gastaldelli A, Cusi K From NASH to diabetes and from diabetes to NASH: Mechanisms and treatment options. JHEP Rep. 2019 Jul 19;1(4):312-328. doi: 10.1016/j.jhepr.2019.07.002. eCollection 2019 Oct.
Miyazaki Y, Matsuda M, DeFronzo RA Dose-response effect of pioglitazone on insulin sensitivity and insulin secretion in type 2 diabetes. Diabetes Care. 2002 Mar;25(3):517-23. doi: 10.2337/diacare.25.3.517.
Rajagopalan S, Dutta P, Hota D, Bhansali A, Srinivasan A, Chakrabarti A Effect of low dose pioglitazone on glycemic control and insulin resistance in Type 2 diabetes: A randomized, double blind, clinical trial. Diabetes Res Clin Pract. 2015 Sep;109(3):e32-5. doi: 10.1016/j.diabres.2015.05.030. Epub 2015 May 15.
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.
