To the Editor: Dr Bos and colleagues1 reported that elderly patients with nonfocal TNAs had a higher risk of major vascular disease and dementia than those without TNAs. This result suggests that lumping various signs and symptoms into TNAs was valid. The opposite approach would be to split the components of TNA and investigate each complaint on its own, but this was not done because an empirical base for subdivision did not exist. While such data may not exist for TNAs, they do for several causes of unconsciousness, a constituent of TNA.
van Dijk JG, Thijs RD, Wieling W. Prognosis of Transient Neurological Attacks. JAMA. 2008;299(15):1771-1773. doi:10.1001/jama.299.15.1771-c