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The Effectiveness of Free and Cued Selective Reminding Test Using Pattern Cue
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Objective：Memory Impairment has been proposed as the first sign in preclinical and early Alzheimer’s disease (AD). This study aims to assess the utility of a new memory test based on Free and Cued Selective Reminding Test using pattern cue that seems useful for detecting memory impairments associated with AD. Methods：Twenty-six patients with mild cognitive impairment, 24 AD patients at a mild stage, 35 normal controls and 8 Lewybody dementia (LBD) patients at a mild stage took part in the study. A newly devised Pattern Cued Recall Test (PCRT) was compared with established memory test, the word list recall from the Korean version of the Consortium to Establish a Registry for Alzheimer’s Disease Assessment Packet (CERAD-K). To assess the ability of the PCRT subtests and CERAD-K to screen dementia, receiver operating characteristic curves were plotted. Results：The distinctive feature of the PCRT was that encoding specificity was increased by adding an immediate cued recall stage at the encoding phase. PCRT was confirmed as having sufficient validity to diagnose dementias. Compared to CERAD-K, the PCRT had similar accuracy of discriminating AD. But the analysis showed better diagnostic validity of PCRT than CERAD-K in LBD. Therefore, this test appears to be, especially, well suited for the diagnosis of mild LBD. Conclusion：This study showed that a memory test based on controlled encoding and retrieval condition and especially using pattern cue could be effective methodology for mild AD and LBD from normal control. PCRT could be an alternative to diagnose LBD by testing visual impairments, which is a hallmark symptom of LBD. Therefore, a further clinical study should be promising.
Abstract
Objective：Memory Impairment has been proposed as the first sign in preclinical and early Alzheimer’s disease (AD). This study aims to assess the utility of a new memory test based on Free and Cued Selective Reminding Test using pattern cue that seems useful for detecting memory impairments associated with AD. Methods：Twenty-six patients with mild cognitive impairment, 24 AD patients at a mild stage, 35 normal controls and 8 Lewybody dementia (LBD) patients at a mild stage took part in the study. A newly devised Pattern Cued Recall Test (PCRT) was compared with established memory test, the word list recall from the Korean version of the Consortium to Establish a Registry for Alzheimer’s Disease Assessment Packet (CERAD-K). To assess the ability of the PCRT subtests and CERAD-K to screen dementia, receiver operating characteristic curves were plotted. Results：The distinctive feature of the PCRT was that encoding specificity was increased by adding an immediate cued recall stage at the encoding phase. PCRT was confirmed as having sufficient validity to diagnose dementias. Compared to CERAD-K, the PCRT had similar accuracy of discriminating AD. But the analysis showed better diagnostic validity of PCRT than CERAD-K in LBD. Therefore, this test appears to be, especially, well suited for the diagnosis of mild LBD. Conclusion：This study showed that a memory test based on controlled encoding and retrieval condition and especially using pattern cue could be effective methodology for mild AD and LBD from normal control. PCRT could be an alternative to diagnose LBD by testing visual impairments, which is a hallmark symptom of LBD. Therefore, a further clinical study should be promising.
참고문헌 (30)
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