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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Validation analysis of informant's ratings of cognitive function in African Americans and Nigerians
International Journal of Geriatric Psychiatry, Volume 21, No. 7, Year 2006
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Description
Objectives: To examine informant validity using the Community Screening Interview for Dementia (CSI 'D') both cross-sectionally and longitudinally in two very different cultures and to explore the effects of informants and study participants' characteristics on the validity of informants' reports. Methods: Elderly African Americans age 65 years and older residing in Indianapolis, USA and elderly Yoruba Nigerians age 65 years and older residing in Ibadan, Nigeria were assessed on cognitive functioning using the CSI 'D' at baseline (1992-1993) and five-year follow-up (1997-1998). At baseline, the informant validity in both samples was evaluated against participants' cognitive tests using Pearson correlation and regular regression models. At follow-up, informants ratings on cognitive decline were assessed against participants' cognitive decline scores from baseline to follow-up using biserial correlation and logistic regressions. Results: At baseline, informants' reports on cognitive fun ctioning significantly correlated with cognitive scores in both samples (Indianapolis:r = -0.43, p < 0.001; Ibadan:r = -0.47, p < 0.001). The participant-informant relationships significantly affected the informants' reports in the two samples with different patterns (p = 0.005 for Indianapolis and p < 0.001 for Ibadan) at a given level of cognitive functioning. African Americans spouses reported more cognitive problems, while siblings reported more problems for the Yoruba Nigerians. At follow-up, informants' ratings on cognitive decline significantly correlated with the cognitive decline scores (Indianapolis r=0.38, p < 0.001; Ibadan r=0.32, p < 0.001). The characteristics of study participants and informants had little impact on the informants' ratings on cognitive decline. Conclusions: Informant reports are valid in assessing the cognitive functioning of study participants both cross-sectionally and longitudinally in two very different cultures, languages and environments. Copyright © 2006 John Wiley & Sons, Ltd.
Authors & Co-Authors
Shen, Jianzhao
United States, Indianapolis
Indiana University School of Medicine
Gao, Sujuan
United States, Indianapolis
Indiana University School of Medicine
Unverzagt, Frederick W.
United States, Indianapolis
University School of Medicine
Ogunniyi, Adesola O.
Nigeria, Ibadan
University of Ibadan
Baiyewu, Olusegun
Nigeria, Ibadan
University of Ibadan
Gureje, Oye
Nigeria, Ibadan
University of Ibadan
Hendrie, Hugh C.
United States, Indianapolis
University School of Medicine
United States, Indianapolis
Regenstrief Institute Inc
Hall, Kathleen S.
United States, Indianapolis
University School of Medicine
Statistics
Citations: 9
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1002/gps.1536
e-ISSN:
10991166
Research Areas
Mental Health
Study Design
Cohort Study
Study Locations
Nigeria