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Estimated probability of Aβ (+) from the optimal MRI and clinical penalized logistic regression models (y-axis) by the observed Aβ status (x-axis). Estimated probabilities > 0.5 correspond to a model-based prediction of Aβ (+). The distributions for Aβ (−) and Aβ (+) subjects are summarized with standard box plots indicating the median, quartiles, and having whiskers extending out to 1.5 times the inter-quartile range.
