Correlation between scales by region. (a) Baseline measures. (b) Mean change from baseline to 18 months for study completers. ADAS-cog11, 11-item Alzheimer’s disease Assessment Scale – cognitive subscale; ADCS-ADL, Alzheimer’s disease Cooperative Study – Activities of Daily Living; AS, Asia; AU, Australia/South Africa; CDR-SB, Clinical Dementia Rating Scale sum of boxes; EE, Eastern Europe/Russia; JP, Japan. MMSE, Mini-Mental State Examination; NA, North America; NPI, Neuropsychiatric Inventory; SA, South America/Mexico; WE, Western Europe/Israel.