Figure 3

Dementia prevalence across countries. The y axis denotes population-weighted dementia prevalence observed in the Survey of Health, Ageing and Retirement in Europe (SHARE). The x axis denotes dementia prevalence based on projections from the Organisation for Economic Co-operation and Development (OECD) and a population-based study in Israel^16,17. Red rectangles reflect country-level prevalence estimates for observed self-reported physician-diagnosis of dementia. Blue triangles reflect classified ‘probable dementia’ based on Langa–Weir (LW [Recall & IADL])^P with a Recall-cutoff reflecting country-level dementia prevalence and an IADL cutoff reflecting 1.5 IQR above Q3. Countries are coded according to ISO alpha 2 country code with labels next to blue triangles (Supplementary Table S3). Vertical dotted lines reflect the discrepancy between observed dementia prevalence in SHARE based on either self-reported physician-diagnosis of dementia or LW [Recall & IADL])^P. The dotted diagonal reflects perfect overlap of dementia prevalence estimates based on SHARE and OECD. Shaded areas reflect confidence limits of linear models for self-report physician-diagnosis of dementia (red) or Langa–Weir (LW [Recall & IADL])^P (blue). Solid lines reflect linear models for dementia prevalence across countries with self-report physician-diagnosis of dementia (red) or Langa–Weir (LW [Recall & IADL])^P (blue). IADL = Instrumental Activities of Daily Living.