Fig. 4

Proportion of regional outliers for the MMSE score subgroups. The questionable dementia subgroup was split into a further two subgroups of MMSE = 26–27 and MMSE = 28–29. The cognitively impaired subgroup ranged from MMSE = 21–25. The colour bar reflects the proportion of outliers from 0.025 to 0.3. Regions in grey indicate that the proportion of outliers for that region was less than 0.025