Coull AJ, Lovett JK, Rothwell PM; Oxford Vascular Study Population based study of early risk of stroke after transient ischaemic attack or minor stroke: implications for public education and organisation of services. BMJ. 2004 Feb 7;328(7435):326. Epub 2004 Jan 26.
Edlow JA, Kim S, Pelletier AJ, Camargo CA Jr National study on emergency department visits for transient ischemic attack, 1992-2001. Acad Emerg Med. 2006 Jun;13(6):666-72. Epub 2006 Apr 11.
Giles MF, Rothwell PM Risk of stroke early after transient ischaemic attack: a systematic review and meta-analysis. Lancet Neurol. 2007 Dec;6(12):1063-72. Epub 2007 Nov 13. Review.
Lotfi A, Schweiger MJ, Giugliano GR, Murphy SA, Cannon CP; TIMI 22 Investigators High-dose atorvastatin does not negatively influence clinical outcomes among clopidogrel treated acute coronary syndrome patients--a Pravastatin or Atorvastatin Evaluation and Infection Therapy-Thrombolysis in Myocardial Infarction 22 (PROVE IT-TIMI 22) analysis. Am Heart J. 2008 May;155(5):954-8. doi: 10.1016/j.ahj.2007.12.009. Epub 2008 Feb 19.
Luengo-Fernandez R, Gray AM, Rothwell PM Effect of urgent treatment for transient ischaemic attack and minor stroke on disability and hospital costs (EXPRESS study): a prospective population-based sequential comparison. Lancet Neurol. 2009 Mar;8(3):235-43. doi: 10.1016/S1474-4422(09)70019-5. Epub 2009 Feb 4.
Ovbiagele B Antiplatelet therapy in management of transient ischemic attack: overview and evidence-based rationale. J Emerg Med. 2008 May;34(4):389-96. doi: 10.1016/j.jemermed.2007.08.056. Epub 2008 Jan 18. Review.
Purroy F, Molina CA, Montaner J, Alvarez-Sabín J Absence of usefulness of ABCD score in the early risk of stroke of transient ischemic attack patients. Stroke. 2007 Mar;38(3):855-6; author reply 857. Epub 2007 Jan 18.
Putman SF, Adams HP Jr Usefulness of heparin in initial management of patients with recent transient ischemic attacks. Arch Neurol. 1985 Oct;42(10):960-2.
Shah KH, Kleckner K, Edlow JA Short-term prognosis of stroke among patients diagnosed in the emergency department with a transient ischemic attack. Ann Emerg Med. 2008 Mar;51(3):316-23. doi: 10.1016/j.annemergmed.2007.08.016. Epub 2007 Oct 25. Review. Erratum in: Ann Emerg Med. 2008 Jun;51(6):774.
Streifler JY Early stroke risk after a transient ischemic attack: can it be minimized? Stroke. 2008 Jun;39(6):1655-6. doi: 10.1161/STROKEAHA.107.510248. Epub 2008 Mar 27.
Wang Y, Johnston SC; CHANCE Investigators Rationale and design of a randomized, double-blind trial comparing the effects of a 3-month clopidogrel-aspirin regimen versus aspirin alone for the treatment of high-risk patients with acute nondisabling cerebrovascular event. Am Heart J. 2010 Sep;160(3):380-386.e1. doi: 10.1016/j.ahj.2010.05.017.
Whisnant JP, Matsumoto N, Elveback LR Transient cerebral ischemic attacks in a community. Rochester, Minnesota, 1955 through 1969. Mayo Clin Proc. 1973 Mar;48(3):194-8.
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.