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Nursing home assessment of cognitive impairment: development and testing of a brief instrument of mental status.

Chodosh J, Edelen MO, Buchanan JL, Yosef JA, Ouslander JG, Berlowitz DR, Streim JE, Saliba D. Nursing home assessment of cognitive impairment: development and testing of a brief instrument of mental status. Journal of the American Geriatrics Society. 2008 Nov 1; 56(11):2069-75.

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Abstract:

OBJECTIVES: To test the accuracy of a brief cognitive assessment of nursing home (NH) residents and to determine whether facility nurses can reliably perform this assessment. DESIGN: Cross-sectional, independent cognitive screening tests with NH residents. SETTING: Six Department of Veteran Affairs nursing facilities. PARTICIPANTS: Three hundred seventy-four residents from six regionally distributed Veteran Affairs NHs. MEASUREMENTS: Three cognitive assessment instruments: the Brief Interview of Mental Status (BIMS), created for this study; the Minimum Data Set (MDS) 2.0 Cognitive Performance Scale (CPS), and the Modified Mini-Mental State Examination (3MS) as the criterion standard. The 15-point BIMS tests memory and orientation and includes free and cued recall items. Research assistants administered the 3MS and BIMS to all subjects. Facility nurses administered the same BIMS to a subsample. RESULTS: Three hundred seventy-four of 417 (89.7%) residents approached completed the 3MS and research assistant-administered BIMS (BIMS-R); 212 residents also received a facility nurse-administered BIMS (BIMS-N). The BIMS-R was more highly correlated with the 3MS than was the CPS (Pearson correlation coefficient (r) = 0.79 vs 0.62; P < .01 for difference). For the subset who received facility assessments, the BIMS-N was also more highly correlated with the 3MS (Pearson r = 0.74 vs 0.65; P < .01 for difference). For any impairment (3MS < 78), the area under the receiver operator characteristic curve (AUC) was 0.86 for the BIMS, versus 0.77 for the CPS. For severe impairment (3MS < 48) the AUC was 0.94, versus 0.85 for the CPS. CONCLUSION: In this population, a brief cognitive test is a more accurate approach to cognitive assessment than the current observational methods employed using the MDS 2.0.





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