All people receiving funded community-based care must undergo a formal needs assessment utilising the interRAI suite (Ministry of Health, 2018). For the 2019/20 year, 28% of those receiving a home care assessment and 49% of those receiving a long-term care facility assessment had a diagnosis of dementia. Assuming one assessment per person, this equates to ~8700 people with dementia in the community and ~18,000 people with dementia in aged residential care.

References:

Ministry of Health. (2018). interRAI. Minstry of Health website. Available from: https://www.health.govt.nz/our-work/life-stages/health-older-people/needs-assessment/interrai#:~:text=interRAI%20is%20a%20suite%20of,and%20in%20aged%20residential%20care.