![]() In the National Inpatient Sample, migraine was almost six times more prevalent in those with TGA. Migraine has been found to be strongly associated with TGA in some, but not all, case-control studies. However, compared with the TIA patients, those with TGA were less likely to have hypertension, diabetes, a history of ischemic stroke, and atrial fibrillation. ![]() In another large study comparing TGA patients, transient ischemic attack (TIA) patients, and matched controls, TGA patients were more likely than age- and sex-matched controls to have hyperlipidemia, previous ischemic stroke, and ischemic heart disease. By contrast, in one study based on the National Inpatient Sample (58 million hospital cases from 1998 to 2008), patients with TGA were almost twice as likely to have hypertension (51 versus 28 percent) and three times as likely to have hyperlipidemia (34 versus 13 percent) as the inpatient population overall. Many case-control studies find no difference in the prevalence of atherosclerotic risk factors such as hypertension, diabetes, and hypercholesterolemia between TGA patients and age- and gender-matched controls. Īlthough cerebral ischemia is one of the postulated causes of TGA, it is controversial whether cerebrovascular risk factors increase the risk of TGA. The incidence of TGA does not differ according to gender. Risk factors - TGA occurs primarily in older adults the majority of episodes occur in individuals between the ages of 50 and 80 years, with a mean age of onset between 60 and 65 years. It is uncommon in individuals less than 50 years of age among those 50 years and older, the incidence is 23.5 to 32 per 100,000 per year. Incidence - In the general population, the incidence of TGA has been estimated as 5.2 to 10 per 100,000 per year.
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