Study Setting Sample Size Mean Age Gender (Female %) Education (years) Ethnicity NCI MCI Dementia NCI MCI Dementia Total Barandt [6]   18 3 Amnesic 45 AD 73.6 77 69.4         Benedict et al. [41] Community and others 541           48.1 63.0% 13.8 85% caucasian, 14% African, 1% others Lacritz       et al. [44]   25     70.7         16.2   Shapiro  et al. [7]   59   55AD 75.3 76.1 76.1     11.5   37   34VaD 73.6 73.1 73.1   11.4   Frank et al. [9] Clinic 15   26       74.7 62.5% 8.5 Caucasian Lacritz   et al. [36]       40 AD   73.4       13.7   Hogervorst [8] Community 114   82       75 44.4% 11 Caucasian Friedman [27] Community 237           range from 60-84   n=173 <= 12 years; African American n=42 12 years; n=22 > 12 years De Jager et al. [10] Community 51 29 60 AD             75 76 AD:77     CVD: 75   50.7% 12   12 CVD Kuslansky  et al. [12 ] Community 323   70 78.6   82   36.4% 12.3 mixed (61.8% Caucasian) Hester et al. [28] Community 203     73.1       55.2% 11.1   Schrijnemaekers et al. [11] Community 54 19 28 76 76.2 77.2 76.4 48.5% 18.2 Caucasian Gaines   et al. [45] Clinic 30   61 63.5   72.6   62.3% 12.4 mixed (75.8% Caucasian) De Jager  et al. [13] Clinic 98 21     77.2 82         Foster  et al. [42] Clinic 31   19 mod AD;  9 mild AD 65.7   74.7     14   Aretouli     et al. [16] Clinic             63.6 49.4% 14.7   Baek   et al. [34] Clinic   112 97 AD   69.1 73.5     11.1   Gómez-Tortosa et al. [40] Cohort   103 with DI <8; 107 with DI>=8         72.3 64.3% 72.4% below level 2 (out of 5)   Shi   et al. [14] Clinic 249 134 97 67.1 69.9 71.1   58.5% 11 Chinese McLaughlin et al. [46] Clinic     22 DLB;   32 AD     DLB:77.9 AD:78.9   66.7% 12.5   Gonza´lez-Palau et al. [15] Community     + Clinic 109 132 54 81.9 82 83.4   74.8% 8.3 Spanish Notes: AD = Alzheimer’s Disease; VaD = Vascular Dementia; CvD = Cerebrovascular Disease; DI = Discrimination Index; mod AD = Moderate AD; DLB = Dementia with Lewy Bodies

Table 1: Demographics of the reviewed studies

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