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Mean standardized delayed recall (DR) scores in decliners and improvers (decliners - light gray triangle; improvers - black circle; MA cohort - dashed line; OA cohort - solid line). After average age 60, decliners have lower DR scores than improvers. * mean DR scores for decliners < improvers, Bonferroni corrected t-tests p < 0.01. Error bars represent standard error of the mean.
