Enhanced Awareness Indicated by Detection Ratio of Dementia with Community-based Active Survey

Background: Little is known about how early awareness is enhanced via a community-based active detection of dementia in comparison with the passive detected dementia through routine clinical practice. Methods: To assess the extent of the awareness, the adjusted detection ratio, the ratio of prevalence to incidence was developed by a Bayesian regression model based on a sample of 183 participants from community-based active survey and 1,921,308 subjects from clinical practice. Results: Given 2.91% prevalence estimated from passive detection and 6.59% prevalence on active survey, and 1.83 % incidence for those aged 65 years or older, the detection ratios were higher in active survey than passive detection for those aged 65-79 years (4.23, 95% CI: 2.68-6.69) versus (1.45, 95% CI: 1.43-1.47). Similar findings were also observed for those aged 80 years Conclusions: Active community-based detection was approximately three times that of passive detection due to the enhanced awareness of early detection of dementia. Keywords: Dementia; Early detection; Prevalence; Incidence