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. 2022 Apr 16;191(8):1429–1443. doi: 10.1093/aje/kwac075

Figure 2.

Figure 2

Distributions of the probabilities of selection into the study, conditional on chronic traumatic encephalopathy (CTE) status, exposure status (highest level of football playing), and death, for an analysis comparing professional American football players with high school football players, VA-BU-CLF Brain Bank, 2008–2019. A) P(S|D+, E3, Death) denotes the probability of selection conditional on CTE diagnosis and having played professional football. B) P(S|D−, E3, Death) denotes the probability of selection conditional on no CTE diagnosis and having played professional football. C) P(S|D+, E1, Death) denotes the probability of selection conditional on CTE diagnosis and having played high school football. D) P(S|D−, E1, Death) denotes the probability of selection conditional on no CTE diagnosis and having played high school football. VA-BU-CLF, Veterans Affairs–Boston University–Concussion Legacy Foundation.