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Dement Geriatr Cogn Disord. 2019 Jan 10;47(1-2):29-41. doi: 10.1159/000492782. [Epub ahead of print]

Development of the Central Africa Daily Functioning Interference Scale for Dementia Diagnosis in Older Adults: The EPIDEMCA Study.

Author information

1
Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219, Bordeaux, Francearlette.edjolo@u-bordeaux.fr.
2
INSERM UMR 1094, Tropical Neuroepidemiology, Faculty of Medicine, Limoges, Francearlette.edjolo@u-bordeaux.fr.
3
Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219, Bordeaux, France.
4
University Limoges, School of Medicine, Institute of Neuroepidemiology and Tropical Neurology, CNRS FR 3503 GEIST, Limoges, France.
5
INSERM UMR 1094, Tropical Neuroepidemiology, Faculty of Medicine, Limoges, France.
6
King's College London, Centre for Global Mental Health, Institute of Psychiatry, Health Service and Population Research Department, London, United Kingdom.
7
Department of Neurology, Amitié Hospital, Bangui, Central African Republic.
8
Department of Neurology, Brazzaville University Hospital, Brazzaville, Congo.
9
Hospital and University Federation of Adult and Geriatric Psychiatry, Limoges, France.
10
CHU, Department of Medical Information and Evaluation, Clinical Research and Biostatistics Unit, Limoges, France.

Abstract

BACKGROUND:

There are a few validated tools capable of assessing the dimensions essential for the diagnosis of dementia and cognitive disorders in sub-Saharan Africa.

OBJECTIVES:

Our aim was to develop an adapted tool, the Central African - Daily Functioning Interference (DFI) scale.

METHODS:

An initial 16-item scale of activity limitations and participation restrictions was completed by 301 participants with low cognitive performances to assess their level of DFI. A psychometric evaluation was performed using Item Response Theory.

RESULTS:

A unidimensional 10-item scale emerged with a reasonable coverage of DFI (thresholds range: -1.067 to 1.587) with good item discrimination properties (1.397-4.076) and a high reliability (Cronbach's al pha = 0.92). The cutoff for detecting 96% of those with dementia was with a latent score ≥0.035 that corresponds to the LAUNDRY limitation.

CONCLUSIONS:

These results provide valuable support for the reliability and internal validity of an operational 10-item scale for DFI assessment used in Central Africa for the diagnosis of dementia in the elderly.

KEYWORDS:

Activity limitations; Central Africa; Daily functioning interference; Dementia diagnosis; Item response theory; Participation restrictions; Psychometric evaluation

PMID:
30630171
DOI:
10.1159/000492782

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