The computerized Hong Kong version of the Oxford cognitive screen for dementia : concurrent validity and reliability

Abstract

The computerized Hong Kong version of the Oxford Cognitive Screen for dementia (HK-OCSd app) is a newly developed cognitive screening tool. The aim of the present study was to investigate the concurrent validity and reliability of the HK-OCSd app. Twenty-eight neurologically healthy Cantonese-speaking individuals were recruited. They performed the HK-OCSd app, the pencil and paper Hong Kong version of the Oxford Cognitive Screen for dementia (HK-OCSd), the Cantonese version of the Mini-Mental State Examination (C-MMSE) and the Hong Kong Montreal Cognitive Assessment (HK-MoCA). Performance from each subtask of the HK-OCSd app were correlated with equivalent subtasks of the HK-OCSd and comparable subtests of the C-MMSE and the HK-MoCA of the same cognitive domain for concurrent validity. Intra-rater, inter-rater and test-retest reliability were also evaluated. Results showed that the HK-OCSd app had good to excellent intra-rater and inter-rater reliability but relatively poor test-retest reliability. Performance on the app was correlated with no more than half HK-OCSd subtasks. Only two subtasks correlated with C-MMSE and HK-MoCA. In conclusion, the HK-OCSd app is not a valid or reliable screening tool.