Purpose of Research: To explore the application, diagnostic accuracy and predictors affecting the test performance of the Rowland Universal Dementia Assessment Scale (RUDAS), which was developed for older populations in Culturally and Linguistically Diverse communities in Australia, in older populations living outside Australia and Aboriginal and Torres Strait Islander peoples in Australia.
Methodology: A literature review was conducted using a simplified approach of thematic analysis. Inclusion criteria consisted of studies with older populations assessed with RUDAS, involving face-to-face RUDAS administration, and written in English. The search terms used was the Rowland Universal Dementia Assessment Scale, sensitivity and specificity. Search was done in Academic Search Complete (EBSCO), Medline with Full-text, Pubmed and Google Scholar.
Findings: Overall, 289 papers were identified through searching databases and one (1) paper from manual searching. A total of 13 articles were included in this review. Outside the target populations of Australian Culturally and Linguistically Diverse Communities, the RUDAS has been tested in Asia, Europe, Africa and Aboriginal and Torres Strait Islander peoples in Australia. The mean sensitivity and specificity respectively across these communities were 81.01 (SD ±8.49; 95% CI) and 80.38 (SD ±11.3; 95% CI). The RUDAS-MMSE mean correlation was 0.62 (SD ±0.14; 95%CI) and mean AUC (Area under curve) was 0.81 (SD ±0.09; 95%CI).
Conclusions: Owing to its good psychometric properties, findings from this literature review indicated that the RUDAS can replace the MMSE for assessment of general cognitive function in all these communities. Research is needed to evaluate the use of the RUDAS in other non- English speaking countries, and to develop and test RUDAS measures that can identify known risks for dementia.