Cognitive impairment in the Amish: A four county survey

C. C. Johnson, B. A. Rybicki, G. Brown, E. D'Hondt, B. Herpolsheimer, David L Roth, C. E. Jackson

Research output: Contribution to journalArticle

Abstract

Background. The prevalence of probable dementia was determined in a rural, homogeneous community of Amish individuals in the Midwestern USA. The Amish are a genetically isolated group with a low level of formal education (≤ 8 years) and few exposures to modern life, who live in intergenerational settings and have strong social support networks. Methods. Using community directories, trained interviewers administered the Mini Mental State Examination (MMSE) and a medical history survey to all Amish over 64 years old in a four county area. Individuals with scores < 27 (out of a maximum of 30 points) were given additional neuropsychological tests. Results were reviewed by a neuropsychologist and subjects were classified with regard to probable cognitive impairment. Results. The MMSE scores were inversely related with age and directly with education. The Amish have higher MMSE scores than reported for the general US population. The overall prevalence of probable cognitive impairment for those over 64 years was 6.4%. The prevalence increased with age and lower education and was lowest among married individuals. Conclusions. The MMSE scores among the Amish were higher than the general population despite their low level of formal education. The lower level of cognitive impairment among the Amish could reflect a lack of inherited susceptibility to dementing diseases, or environmental factors characteristic of their traditional lifestyle. Even among this population with ≤ 8 years of formal education, education may protect against cognitive impairment.

Original languageEnglish (US)
Pages (from-to)387-394
Number of pages8
JournalInternational Journal of Epidemiology
Volume26
Issue number2
DOIs
StatePublished - Jan 1 1997
Externally publishedYes

Fingerprint

Amish
Education
Social Support
Population
Directories
Neuropsychological Tests
Rural Population
Dementia
Cognitive Dysfunction
Surveys and Questionnaires
Life Style
Interviews

Keywords

  • Amish
  • Cognitive impairment
  • Community survey
  • Dementia
  • MMSE
  • Prevalence

ASJC Scopus subject areas

  • Epidemiology

Cite this

Johnson, C. C., Rybicki, B. A., Brown, G., D'Hondt, E., Herpolsheimer, B., Roth, D. L., & Jackson, C. E. (1997). Cognitive impairment in the Amish: A four county survey. International Journal of Epidemiology, 26(2), 387-394. https://doi.org/10.1093/ije/26.2.387

Cognitive impairment in the Amish : A four county survey. / Johnson, C. C.; Rybicki, B. A.; Brown, G.; D'Hondt, E.; Herpolsheimer, B.; Roth, David L; Jackson, C. E.

In: International Journal of Epidemiology, Vol. 26, No. 2, 01.01.1997, p. 387-394.

Research output: Contribution to journalArticle

Johnson, CC, Rybicki, BA, Brown, G, D'Hondt, E, Herpolsheimer, B, Roth, DL & Jackson, CE 1997, 'Cognitive impairment in the Amish: A four county survey', International Journal of Epidemiology, vol. 26, no. 2, pp. 387-394. https://doi.org/10.1093/ije/26.2.387
Johnson CC, Rybicki BA, Brown G, D'Hondt E, Herpolsheimer B, Roth DL et al. Cognitive impairment in the Amish: A four county survey. International Journal of Epidemiology. 1997 Jan 1;26(2):387-394. https://doi.org/10.1093/ije/26.2.387
Johnson, C. C. ; Rybicki, B. A. ; Brown, G. ; D'Hondt, E. ; Herpolsheimer, B. ; Roth, David L ; Jackson, C. E. / Cognitive impairment in the Amish : A four county survey. In: International Journal of Epidemiology. 1997 ; Vol. 26, No. 2. pp. 387-394.
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