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  • Title: The Bayer-Activities of Daily Living Scale (B-ADL): results from a validation study in three European countries.
    Author: Erzigkeit H, Lehfeld H, Peña-Casanova J, Bieber F, Yekrangi-Hartmann C, Rupp M, Rappard F, Arnold K, Hindmarch I.
    Journal: Dement Geriatr Cogn Disord; 2001; 12(5):348-58. PubMed ID: 11455136.
    Abstract:
    The Bayer-Activities of Daily Living Scale (B-ADL) is a 25-item, informant-rated questionnaire which was developed as a brief and internationally applicable instrument for assessing functional disabilities. The scale's target group are elderly patients suffering from mild to moderate dementia or cognitive impairment. To investigate the reliability and validity of different language versions, the B-ADL was administered in the UK, Germany, and Spain to a total of 1,433 subjects with a wide range of cognitive decline. The results from the three country samples were very similar, with internal consistency being above 0.98 (Cronbach alpha). A factor analysis revealed that a one-factor solution accounted for most of the variance. The B-ADL total score significantly increased between adjacent Global Deterioration Scale (GDS) stages 1 to 5. A second factor analysis entering additional variables (GDS stage, Mini-Mental State Examination or MMSE subscores, age, years of education, gender, and country) revealed that all B-ADL items loaded on the same factor, "dementia severity", and that they were not related to age, education, gender, or country. In the identification of subjects with clinically manifest dementia symptoms (GDS stages 4 and 5), the B-ADL proved to be as efficient as the MMSE in the UK and German samples and superior to the MMSE in the Spanish sample.
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