ABSTRACT
Introduction
While risk factor prevalence of individual risk factors for dementia varies between ethnic groups in New Zealand (NZ), it is not known whether the effect of these risks is the same in each group.
Methods
This retrospective cohort study identified incident cases of dementia. Cox regression models calculated the hazard ratio for dementia for each of the risk factors, after adjustment for age and sex.
Results
Education, smoking, diabetes, depression, physical activity and social isolation were associated with a 1.13–1.55 times increased risk of dementia. We did not demonstrate an association between dementia risk and hypertension, alcohol, or air pollution. Differences between ethnic groups is suggested but not confirmed due to study power.
Discussion
Differences in dementia prevention potential between ethnic groups in NZ are potentially contributed to by both differential prevalence and risk factor effects. Public health strategies must be tailored for the ethnic populations at most risk.