The Quick Mild Cognitive Impairment (Q mci) screen is a brief cognitive screening instrument, validated for use in Australian, Canadian, Dutch, Irish, and Turkish populations. Cognitive screening tools with appropriate diagnostic properties are critical for effective clinical practice. Floor and ceiling effects must be considered in cognitive function tests. Moreover, half of the MoCA subtests have shown significant floor effects in assessments of Parkinson’s disease. The ceiling effect and lack of dynamic performance range in the MMSE increase the likelihood that individuals in the early stages of MCI or dementia score within the normal range. On comparing the MMSE and MoCA, the MoCA can efficiently discriminate MCI, whereas the MMSE can efficiently discriminate dementia. In Taiwan, the most widely used cognitive screening instruments are the Traditional Chinese version of the Mini–Mental State Examination (MMSE) and the Taiwanese version of the Montreal Cognitive Assessment (MoCA). Differentiation among individuals with MCI and dementia and normal controls (NCs) is critical for appropriate pharmacotherapeutic and nonpharmacotherapeutic treatment courses. In general, people with MCI are at a greater risk of developing dementia than other aged-matched individuals, and approximately half of progressions into dementia occur within a 5-year period. Individuals with MCI involving instrumental activities of daily living limitations are more likely to develop dementia. Although people with MCI are completely capable of self-care activities, they exhibit slight impairment in memory, attention, orientation to time, visuospatial perception, problem solving, instrumental activities of daily living, and judgment these impairments may affect community participation and job security. The reported proportion of individuals with mild cognitive impairment (MCI) is expected even higher than of those with dementia however, in clinical practice, most MCI cases in older adults remain unidentified. The population of older people with dementia is expected to increase concurrently with global aging. The number of people aged older than 65 years is increasing worldwide. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Ĭompeting interests: The authors have declared that no competing interests exist. įunding: This work was supported by Grant Number 201707 from the Taipei Hospital, Ministry of Health and Welfare, Taiwan (R.O.C.), to WYC. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: Data are available from the IRB of the Taipei Hospital, Ministry of Health and Welfare for researchers who meet the criteria for access to confidential data. Received: Accepted: NovemPublished: December 3, 2018Ĭopyright: © 2018 Lee et al. Steinborn, University of Wuerzburg, GERMANY The Q mci-TW may be a useful clinical screening tool for a spectrum of cognitive impairments.Ĭitation: Lee M-T, Chang W-Y, Jang Y (2018) Psychometric and diagnostic properties of the Taiwan version of the Quick Mild Cognitive Impairment screen. The MoCA exhibited the highest accuracy in differentiating MCI from NC, followed by the Q mci-TW and then MMSE whereas, the Q mci-TW and MMSE exhibited the same accuracy in differentiating dementia from MCI, followed by the MoCA. The optimal cut-off score on the Q mci-TW for differentiating MCI from NC was ≤ 51.5/100 and dementia from MCI was ≤ 31/100. The Q mci-TW exhibited satisfactory test–retest reliability, internal consistency, and interrater reliability as well as a strong positive correlation with results from the MoCA and MMSE. For analysis, we used Cronbach’s α, intraclass correlation coefficient, Spearman’s ρ, Kruskal–Wallis test, receiver operating characteristic curve analysis, and multivariate analysis, as appropriate. Their results on the Q mci-TW, Taiwanese version of the Montreal Cognitive Assessment (MoCA), and Traditional Chinese version of the Mini–Mental State Examination (MMSE) were compared. Thirty-one participants with dementia and 36 with MCI and 35 NCs were recruited from a neurology department of regional hospital in Taiwan. This research aims to evaluate the psychometric and diagnostic properties of the Taiwan version of Q mci (Q mci-TW) screen and to explore the discriminating ability of the Q mci-TW in differentiating among normal controls (NCs), MCI and dementia. There is a need for a screening tool with capacities of accurate detection of early mild cognitive impairment (MCI) and dementia and is suitable for use in a range of languages and cultural contexts.
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