Normative CERAD-NP Performance among Community-Dwelling Older Adults in Ireland
Highlighting the need for good dementia screening tools, Murphy (2012) aimed to provide normative data for the Consortium to Establish a Registry for Alzheimer’s Disease Neuropsychological (CERAD-NP; Morris et al., 1989) test battery, derived from an Irish-based sample. This test battery has been found effective in distinguishing between Alzheimer’s disease, dementia, mild cognitive impairment and normal ageing. Ninety-nine participants deemed cognitively normal (MMSE=23 or above) undertook the battery of tests and results were then spilt according to education and age. No significant relationship between age and cognitive performance was found. In line with other studies there were some differences between lower and higher education levels supporting the concept of cognitive reserve related to higher education. While norms in the Irish sample are generally in line with the US and Australia, a significant difference is found in the test, confrontational naming. The mean of the Irish sample is more than one standard deviation less than US and Australian samples, and over two standard deviations lower for the more highly educated categories. The authors suggest that item familiarity is important and that local and cultural norms should be considered for this test. The authors conclude that CERAD-NP norms generated for US and Australian samples can be used in Ireland with the exception of confrontational naming.
MURPHY, M. 2012. Normative CERAD-NP Performance among Community-Dwelling Older Adults in Ireland. Clinical Gerontologist, 35(1):15-26