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Int. J. Environ. Res. Public Health 2019, 16(6), 917;

Validity of the Japanese Version of the Quick Mild Cognitive Impairment Screen

Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
Clinical Sciences Institute, National University of Ireland Galway, H91 TK33 Galway City, Ireland
Centre for Gerontology and Rehabilitation, University College Cork, St Finbarrs Hospital, Douglas road, T12 XH60 Cork City, Ireland
Institute of Gerontology, The University of Tokyo, Tokyo 113-8656, Japan
Department of Preventive Medicine and Public Health, Tokyo Medical University, Tokyo 160-8402, Japan
Division of International Health, Graduate School of Medical and Dental Sciences, Niigata University, Niigata 951-8122, Japan
Author to whom correspondence should be addressed.
Received: 14 January 2019 / Revised: 28 February 2019 / Accepted: 8 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Efficient Use of Acute Hospital Services for Older People)
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Early detection of dementia provides opportunities for interventions that could delay or prevent its progression. We developed the Japanese version of the Quick Mild Cognitive Impairment (Qmci-J) screen, which is a performance-based, easy-to-use, valid and reliable short cognitive screening instrument, and then we examined its validity. Community-dwelling adults aged 65–84 in Niigata prefecture, Japan, were concurrently administered the Qmci-J and the Japanese version of the standardized Mini-Mental State Examination (sMMSE-J). Mild cognitive impairment (MCI) and dementia were categorized using established and age-adjusted sMMSE-J cut-offs. The sample (n = 526) included 52 (9.9%) participants with suspected dementia, 123 (23.4%) with suspected MCI and 351 with likely normal cognition. The Qmci-J showed moderate positive correlation with the sMMSE-J (r = 0.49, p < 0.001) and moderate discrimination for predicting suspected cognitive impairment (MCI/dementia) based on sMMSE-J cut-offs, area under curve: 0.74, (95%CI: 0.70–0.79), improving to 0.76 (95%CI: 0.72 to 0.81) after adjusting for age. At a cut-off of 60/61/100, the Qmci-J had a 73% sensitivity, 68% specificity, 53% positive predictive value, and 83% negative predictive value for cognitive impairment. Normative data are presented, excluding those with any sMMSE-J < 27. Though further research is required, the Qmci-J screen may be a useful screening tool to identify older adults at risk of cognitive impairment. View Full-Text
Keywords: cognitive impairment; short cognitive screen instrument; Japanese; older adults; screening cognitive impairment; short cognitive screen instrument; Japanese; older adults; screening

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Morita, A.; O’Caoimh, R.; Murayama, H.; Molloy, D.W.; Inoue, S.; Shobugawa, Y.; Fujiwara, T. Validity of the Japanese Version of the Quick Mild Cognitive Impairment Screen. Int. J. Environ. Res. Public Health 2019, 16, 917.

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