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J Neurol Neurosurg Psychiatry 2002;73:385-389 doi:10.1136/jnnp.73.4.385
  • Paper

Testing cognitive function in elderly populations: the PROSPER study

  1. P J Houx1,
  2. J Shepherd2,
  3. G-J Blauw3,
  4. M B Murphy4,
  5. I Ford2,
  6. E L Bollen3,
  7. B Buckley4,
  8. D J Stott2,
  9. W Jukema3,
  10. M Hyland4,
  11. A Gaw2,
  12. J Norrie2,
  13. A M Kamper3,
  14. I J Perry4,
  15. P W MacFarlane2,
  16. A Edo Meinders3,
  17. B J Sweeney4,
  18. C J Packard2,
  19. C Twomey4,
  20. S M Cobbe2,
  21. R G Westendorp3
  1. 1University Maastricht, Maastricht, The Netherlands
  2. 2University Glasgow, Glasgow, Scotland
  3. 3Leiden University Medical Centre, Leiden, The Netherlands
  4. 4University Cork, Cork, Ireland
  1. Correspondence to:
 Dr R G J Westendorp, Section of Gerontology and Geriatrics, Leiden University Medical Center, C-2-R, PO box 9600, 2300 RC Leiden, The Netherlands;
 R.G.J.Westendorp{at}LUMC.nl
  • Received 29 April 2002
  • Accepted 3 July 2002
  • Revised 1 July 2002

Abstract

Objectives: For large scale follow up studies with non-demented patients in which cognition is an endpoint, there is a need for short, inexpensive, sensitive, and reliable neuropsychological tests that are suitable for repeated measurements. The commonly used Mini-Mental-State-Examination fulfils only the first two requirements.

Methods: In the PROspective Study of Pravastatin in the Elderly at Risk (PROSPER), 5804 elderly subjects aged 70 to 82 years were examined using a learning test (memory), a coding test (general speed), and a short version of the Stroop test (attention). Data presented here were collected at dual baseline, before randomisation for active treatment.

Results: The tests proved to be reliable (with test/retest reliabilities ranging from acceptable (r=0.63) to high (r=0.88) and sensitive to detect small differences in subjects from different age categories. All tests showed significant practice effects: performance increased from the first measurement to the first follow up after two weeks.

Conclusion: Normative data are provided that can be used for one time neuropsychological testing as well as for assessing individual and group change. Methods for analysing cognitive change are proposed.

Footnotes

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