Table 4.

Estimated Bounds of Joint Probabilities of the Highest Level of American Football Played and CTE Status, Conditional on Death, VA-BU-CLF Brain Bank, 2008–2019

Joint Probabilities a	Lower Bound	Upper Bound

Abbreviations: CTE, chronic traumatic encephalopathy; VA-BU-CLF, Veterans Affairs–Boston University–Concussion Legacy Foundation.

^a  P(D+, E1|Death) denotes the joint probability of CTE diagnosis and having played high school football; P(D+, E2|Death) denotes the joint probability of CTE diagnosis and having played college football; and P(D+, E3|Death) denotes the joint probability of CTE diagnosis and having played professional football. P(D−, E1|Death) denotes the joint probability of no CTE diagnosis and having played high school football; P(D−, E2|Death) denotes the joint probability of no CTE diagnosis and having played college football; and P(D−, E3|Death) denotes the joint probability of no CTE diagnosis and having played professional football.