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. 2019 Feb 22;11:170–179. doi: 10.1016/j.dadm.2018.12.010

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© 2019 Published by Elsevier Inc. on behalf of the Alzheimer's Association.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 2 — Frequency of impairments within subjects (breadth of impairment). Bar graphs represent number of subjects that have between 0 and 12 tests impaired (0 to 10 the AD group due to lack of data in Stroop neutral and affective tests). A between-groups comparison, taking into account the number of subjects with 3 or less tests impaired and number of subjects with more than 3 tests impaired, revealed significantly differences between all groups: 14% EHC, 67% MCI, and 95% had more than 3 tests impaired (EHC vs. MCI χ² = 47.64, P < .0001; EHC vs. AD χ² = 107.54, P < .0001; MCI vs. AD χ² = 13.85, P = .0002). Abbreviations: EHC, elderly healthy controls; MCI, mild cognitive impairment; AD, Alzheimer's disease.