Revising the ADAS-cog for a more accurate assessment of cognitive impairment.

  title={Revising the ADAS-cog for a more accurate assessment of cognitive impairment.},
  author={Hans Wouters and Willem A van Gool and Ben A. Schmand and Robert Lindeboom},
  journal={Alzheimer disease and associated disorders},
  volume={22 3},
BACKGROUND To examine whether it is appropriate to sum the cognitive part of the Alzheimer Disease Assessment Scale (ADAS-cog) items to assess cognitive impairment. This assumes items to have (1) equal measurement precision and (2) hierarchically ordered categories. METHODS Rasch analysis on the basis of pooled data from 3 Randomized Controlled Trials was used to examine these assumptions and to estimate each patient's level of impairment. Analyses were replicated in an independent sample… CONTINUE READING

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