Crude mean and range of dementia incidence rate for all nine general practitioner registration networks (1992–2014), and number and percentage of person-years per age group.
&nbsp; <p>The Harmonised Cognitive Assessment Protocol (HCAP) is part of the <a title="Healthy Cognitive Aging Project" href="https://www.ucl.ac.uk/epidemiology-health-care/research/bsh/r