Risk factors and Alzheimer's disease: A comparative study of two communities

Kathleen Hall, Oye Gureje, Sujuan Gao, Adesola Ogunniyi, Siu Hui, Olusegun Baiyewu, Frederick Unverzagt, Steve Oluwole, Hugh Hendrie

Research output: Contribution to journalArticle

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Abstract

Objective: To determine the association between demographic, lifestyle and medical history factors to Alzheimer's disease (AD), we studied samples of two community dwelling populations with significantly different prevalence rates of AD in Indianapolis, USA (6.24%) and Ibadan, Nigeria (1.4%). Methods: The samples were drawn from African-American community dwelling residents 65 years of age and over in Indianapolis, and Yoruba community-dwelling residents 65 years of age and over in Ibadan. A two-stage epidemiological design was used in which diagnosis of AD was by National Institute of Neurological and Communicative Disorders and Stroke and the Alzheimer's Disease and Related Disorders Association criteria. Results: In Indianapolis, age (odds ratio [OR]= 1.16; 95% confidence interval [CI] = 1.11-1.21), family history of dementia (OR = 5.40; 95% CI = 1.99-14.62), low education (0-6 years, OR = 3.49; 95% CI = 1.06-11.48) and rural residence (OR = 2.49; 95% CI = 1.05-5.88) were associated with a higher risk of AD. In Ibadan, age (OR = 1.15; 95% CI = 1.12-1.18) and female gender (OR = 13.9; 95% CI = 3.85-50.28) were associated with a higher risk of AD. Conclusions: The remarkably similar odds ratios between age and AD between sites suggest that biological processes associated with ageing are essential elements in the development of AD but that genetic and environmental risk factors may alter age-specific rates. In our longitudinal study, we intend to investigate in more depth the interaction between these ageing, genetic and environmental factors.

Original languageEnglish
Pages (from-to)698-706
Number of pages9
JournalAustralian and New Zealand Journal of Psychiatry
Volume32
Issue number5
StatePublished - Oct 1998

Fingerprint

Alzheimer Disease
Odds Ratio
Confidence Intervals
Independent Living
National Institute of Neurological Disorders and Stroke
Communication Disorders
Biological Phenomena
Nigeria
African Americans
Longitudinal Studies
Dementia
Life Style
Demography
Education
Population

Keywords

  • Alzheimer's disease
  • Community
  • Risk factors

ASJC Scopus subject areas

  • Psychiatry and Mental health

Cite this

Risk factors and Alzheimer's disease : A comparative study of two communities. / Hall, Kathleen; Gureje, Oye; Gao, Sujuan; Ogunniyi, Adesola; Hui, Siu; Baiyewu, Olusegun; Unverzagt, Frederick; Oluwole, Steve; Hendrie, Hugh.

In: Australian and New Zealand Journal of Psychiatry, Vol. 32, No. 5, 10.1998, p. 698-706.

Research output: Contribution to journalArticle

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abstract = "Objective: To determine the association between demographic, lifestyle and medical history factors to Alzheimer's disease (AD), we studied samples of two community dwelling populations with significantly different prevalence rates of AD in Indianapolis, USA (6.24{\%}) and Ibadan, Nigeria (1.4{\%}). Methods: The samples were drawn from African-American community dwelling residents 65 years of age and over in Indianapolis, and Yoruba community-dwelling residents 65 years of age and over in Ibadan. A two-stage epidemiological design was used in which diagnosis of AD was by National Institute of Neurological and Communicative Disorders and Stroke and the Alzheimer's Disease and Related Disorders Association criteria. Results: In Indianapolis, age (odds ratio [OR]= 1.16; 95{\%} confidence interval [CI] = 1.11-1.21), family history of dementia (OR = 5.40; 95{\%} CI = 1.99-14.62), low education (0-6 years, OR = 3.49; 95{\%} CI = 1.06-11.48) and rural residence (OR = 2.49; 95{\%} CI = 1.05-5.88) were associated with a higher risk of AD. In Ibadan, age (OR = 1.15; 95{\%} CI = 1.12-1.18) and female gender (OR = 13.9; 95{\%} CI = 3.85-50.28) were associated with a higher risk of AD. Conclusions: The remarkably similar odds ratios between age and AD between sites suggest that biological processes associated with ageing are essential elements in the development of AD but that genetic and environmental risk factors may alter age-specific rates. In our longitudinal study, we intend to investigate in more depth the interaction between these ageing, genetic and environmental factors.",
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