Demographic summary including cognitive features for Alzheimer’s disease patients and for a group of elderly controls.

Disease severity (as measured by ACE-R) enabled a median split of the patient cohort into very mild and mild Alzheimer’s disease subgroups.
Where appropriate, group values are given as mean (SD).
MMSE/30 = Mini-mental state examination score out of 30-point total; ACE-R/100 = Addenbrooke’s cognitive examination-revised score out of 100-point total.
Wilcoxon rank-sum significance levels: *P<0.01 (Alzheimer’s disease worse than controls, two-tailed); **P<0.05 (Alzheimer’s disease worse than controls, two-tailed, Bonferroni-corrected on n = 28 tests); ∧P<0.05 (Mild worse than very mild Alzheimer’s disease, two-tailed, Bonferroni-corrected on n = 28).