Screening for cognitive impairment in an elderly veteran population: acceptability and results using different versions of the Mini-Cog.

Abstract:

OBJECTIVES:To assess the feasibility of cognitive screening in older veterans presenting for routine primary care. DESIGN:Quality improvement initiative. SETTING:Seven Veterans Affairs Medical Centers. PARTICIPANTS:Veterans aged 70 and older without a prior diagnosis of cognitive impairment. MEASUREMENTS:Scores from 16 different versions of the Mini-Cog, a 5-point cognitive screen consisting of three-word recall (0-3 points) with a clock-drawing interference task (0 or 2 points). Five word lists were paired with three clock times and randomly ordered for presentation with the original Mini-Cog version. The conventional dementia screening cut point was increased to maximize sensitivity; to pass, patients had to draw the clock correctly and recall at least two of three words (score 4 or 5/5). RESULTS:Administering the Mini-Cog took 90 to 180 seconds. Of 8,342 veterans approached, 8,063 (96.7%) agreed to be screened; 2,081 (25.8%) scored less than 4 out of 5. Scores declined with age, but age did not predict pass or fail. Different word lists produced different screen failure rates, ranging from 21.2% to 33.4%. Five dementia specialists were unable to distinguish harder from easier lists. Different clock times accounted for 2% or less of the difference in failure rates. CONCLUSION:The Mini-Cog was quick and well accepted by older veterans. Many with no prior documentation of cognitive impairment failed the screen. Failure rates varied with the word list used, revealing that even apparently minor changes in test items affect screen results. Additional study is needed to establish the value of cognitive screening in shaping primary care of older veterans.

journal_name

J Am Geriatr Soc

authors

McCarten JR,Anderson P,Kuskowski MA,McPherson SE,Borson S

doi

10.1111/j.1532-5415.2010.03249.x

subject

Has Abstract

pub_date

2011-02-01 00:00:00

pages

309-13

issue

2

eissn

0002-8614

issn

1532-5415

journal_volume

59

pub_type

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