Preliminary evidence of high prevalence of cerebral microbleeds in astronauts with spaceflight experience.

Astronauts with previous spaceflight experience demonstrated a nonsignificant trend towards being more likely to have a higher total microbleed count ( t 14 = 1.945, p = .072, d = 1.004), but no significant difference in simple microbleed presence ( t 14 = 0.764, p = .458, d = 0.524).

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