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- Buchwald, Fredrik, et al.
(author)
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Validation of Diagnoses of Transient Ischemic Attack in the Swedish Stroke Register (Riksstroke) TIA-Module
- 2015
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In: Neuroepidemiology. - : S. Karger. - 0251-5350 .- 1423-0208. ; 45:1, s. 40-43
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Journal article (peer-reviewed)abstract
- Background: In 2010, the Swedish Stroke Register (Riksstroke; RS) established a module for transient ischemic attacks (RS-TIA). We report a diagnostic validation study of patients included in RS-TIA.Methods: During the first year, 7,825 patients were registered at 59 out of 74 Swedish hospitals. A time-based TIA definition was applied. A sample of 180 patients (30 patients each from 6 hospitals), with a similar distribution of age and sex as in RS-TIA, was prepared. Two independent observers assessed medical records for quality of documentation and assigned a diagnosis of likely, possible, unlikely TIA or ischennic stroke, according to pre-specified criteria.Results:The 2 observers agreed in 77% of cases that the event was a likely or possible TIA, in 3% that the event was an ischemic stroke, and in 2% that the event was an unlikely TIA. The observers disagreed in 8% of patients on TIA vs. ischennic stroke, and in 11% on a vascular vs. non-vascular cause. Quality of documentation was fair.Conclusions: There was interobserver agreement on diagnosis of TIA in the majority of patients included in RS-TIA. Diagnostic accuracy may be further improved by more systematic documentation of symptoms and signs.
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| 2. |
- Tavosian, Alborz, et al.
(author)
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Incidence of Transient ischemic Attacks in Sweden
- 2016
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In: Neuroepidemiology. - Basel : S. Karger. - 0251-5350 .- 1423-0208. ; 47:1, s. 20-25
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Journal article (peer-reviewed)abstract
- Background and Purpose: Stroke incidence may be on the decline in high-income countries. There may have been a shift from severe forms of cerebrovascular disease to less severe forms. No study regarding transient ischemic attack (TIA) incidence has been performed in Sweden since the 1980s.Methods: We used 2011 and 2012 data from the Swedish stroke register. A large proportion of Sweden's 72 hospitals took part in the TIA register, meaning that 63 (2011) and 66 (2012) percent of the entire population were studied.Results: The number of TIA-cases was 13,880. The number of first ever TIA cases was 9098, 4,675 in men, and 4,423 in women, comprising 66% of all TIAs. The crude overall IR for first ever TIA was 74 per 100,000. The age- and sex-standardized IRs were 73 per 100,000 when standardized to the European population of 2013, and 47 per 100,000 when standardized to the European population 1976.Conclusions: The TIA incidence in Sweden is high, and no decline is seen when compared with previous studies. Better prevention may have caused a shift from severe forms of cerebrovascular disease to less severe forms. Fordemographic reasons, the health services will most likely face an increasing number of TIA patients in the coming years.
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