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Kaplan-Meier survival curves for values of the only participant-based ECog item retained in the model (ECog item “keeping mail and papers organized”). “Survival” means maintenance of a stable diagnosis of CN as opposed to progression from CN to MCI. Different ECog item scores are illustrated (the score range is 1–4, but the highest score for this item in the current analysis was 3). CN (clinically normal), ECog (Everyday Cognition), MCI (mild cognitive impairment).
