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Table 2 Symptom onset data from contact sport athletes

From: Tau pathology in the medial temporal lobe of athletes with chronic traumatic encephalopathy: a chronic effects of neurotrauma consortium study

Stage n Age at symptom onseta Retirement to symptom onset (years) Symptom onset to death (years)
II 11b 36 ± 16 (17–62) 10 ± 16 (− 10–36) 12 ± 10 (1–34)
III 13 44 ± 15 (27–70) 17 ± 17 (− 6–47) 21 ± 12 (5–41)
IV 13 57 ± 14 (29–81) 29 ± 17 (2–54) 17 ± 11 (4–37)
  1. anumbers presented as mean ± SD (range)
  2. btwo CTE stage II individuals had no reported symptoms, and one CTE stage II individual had an unknown age of retirement