There is evidence of differences in dementia prevalence by gender. A study further estimates the difference in prevalence of very mild and mild dementia by gender for people aged 60 and over and people aged 70 and over. For mild dementia, the prevalence for female and male aged 60 and above were 7.6% and 3.1% respectively; and for female and male aged 70 or above were 12.3% and 5.0% respectively (Lam et al., 2008). However, there is no data regarding the difference in dementia prevalence on different ethnic groups in Hong Kong.

References:

Lam, L. C., Tam, C. W., Lui, V. W., Chan, W., Chan, S. S., Wong, S., . . . Chiu, H. (2008). Prevalence of very mild and mild dementia in community-dwelling older Chinese people in Hong Kong. International Psychogeriatrics, 20(1), 135-148. https://doi.org/10.1017/S1041610207006199