Editing Transient ischemic attack (section)

== Epidemiology ==
With the difficulty in diagnosing a TIA due to its nonspecific symptoms of neurologic dysfunction at presentation and a differential including many mimics, the exact incidence of the disease is unclear. It was estimated to have an incidence of approximately 200,000 to 500,000 cases per year in the US in the early 2000s according to the [[American Heart Association]].<ref name=pmid19423857/> TIA incidence trends similarly to [[stroke]], such that incidence varies with age, gender, and different race/ethnicity populations.<ref name=pmid19423857/><ref>{{cite journal | vauthors = Ramirez L, Kim-Tenser MA, Sanossian N, Cen S, Wen G, He S, Mack WJ, Towfighi A | display-authors = 6 | title = Trends in Transient Ischemic Attack Hospitalizations in the United States | journal = Journal of the American Heart Association | volume = 5 | issue = 9 | page = e004026 | date = September 2016 | pmid = 27664805 | pmc = 5079046 | doi = 10.1161/jaha.116.004026 }}</ref><ref name=NBK459143/> Associated risk factors include age greater than or equal to 60, blood pressure greater than or equal to 140 systolic or 90 diastolic, and comorbid diseases, such as [[diabetes]], [[hypertension]], [[atherosclerosis]], and [[atrial fibrillation]]. It is thought that approximately 15 to 30 percent of strokes have a preceding TIA episode associated.<ref name=NBK459143/><ref name=pmid23062043/><ref>{{cite journal | vauthors = Wheatley MA, Ross MA | title = Care of Neurologic Conditions in an Observation Unit | journal = Emergency Medicine Clinics of North America | volume = 35 | issue = 3 | pages = 603–623 | date = August 2017 | pmid = 28711127 | doi = 10.1016/j.emc.2017.03.007 }}</ref>