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

Author

Listed:
  • Ayako Morita

    (Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo 113-8510, Japan)

  • Rónán O’Caoimh

    (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)

  • Hiroshi Murayama

    (Institute of Gerontology, The University of Tokyo, Tokyo 113-8656, Japan)

  • D. William Molloy

    (Clinical Sciences Institute, National University of Ireland Galway, H91 TK33 Galway City, Ireland)

  • Shigeru Inoue

    (Department of Preventive Medicine and Public Health, Tokyo Medical University, Tokyo 160-8402, Japan)

  • Yugo Shobugawa

    (Division of International Health, Graduate School of Medical and Dental Sciences, Niigata University, Niigata 951-8122, Japan)

  • Takeo Fujiwara

    (Department of Global Health Promotion, Tokyo Medical and Dental University, Tokyo 113-8510, Japan)

Abstract

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 (Q mci -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 Q mci -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 Q mci -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 Q mci -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 Q mci -J screen may be a useful screening tool to identify older adults at risk of cognitive impairment.

Suggested Citation

  • Ayako Morita & Rónán O’Caoimh & Hiroshi Murayama & D. William Molloy & Shigeru Inoue & Yugo Shobugawa & Takeo Fujiwara, 2019. "Validity of the Japanese Version of the Quick Mild Cognitive Impairment Screen," IJERPH, MDPI, vol. 16(6), pages 1-10, March.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:6:p:917-:d:213852
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    References listed on IDEAS

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