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Comparison of the diagnostic accuracy of the Cognitive Performance Scale (Minimum Data Set) and the Mini-Mental State Exam for the detection of cognitive impairment in nursing home residents

✍ Scribed by Louis Paquay; Jan De Lepeleire; Birgitte Schoenmakers; Michel Ylieff; Ovide Fontaine; Frank Buntinx

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 189 KB
Volume: 22
Category: Article
ISSN: 0885-6230
DOI: 10.1002/gps.1671

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Objective

To compare the diagnostic accuracy of an outcome measurement scale of the Minimum Data Set of the Resident Assessment Instrument for nursing homes (MDS/RAI‐NH), the Cognitive Performance Scale (CPS) and the Mini‐Mental State Exam (MMSE) for the detection of cognitive impairment. The Cambridge Examination for Mental Disorders of the Elderly – Revised (CAMDEX‐R) was used as the reference standard.

Study design and setting

This study was part of a larger prospective study (QUALIDEM) involving a diagnostic procedure and two‐year follow‐up on the quality of primary care for demented patients. CAMDEX‐R and MDS/RAI‐NH were administered to 198 residents, aged 65 or more, living in 42 low and high care institutions for aged people.

Main outcome measures

Indicators of diagnostic accuracy: sensitivity, specificity, predictive values, likelihood ratios, odds ratio and area under receiver operating characteristics curve (AUC).

Results

The CAMDEX‐based prevalence of cognitive impairment was 75%. The diagnostic values of a CPS score of two or more for the detection of cognitive impairment were: sensitivity = 0.81; specificity = 0.80; PPV = 0.92; NPV = 0.57. The diagnostic values of a MMSE score of less than or equal 23 were: sensitivity = 0.97; specificity = 0.59; PPV = 0.88; NPV = 0.85. For CPS, the area under the receiver operating characteristic (ROC) curve was 0.87 (95% CI, 0.81–0.91), and not significantly different (p = 0.63) from the MMSE score, 0.88 (0.83–0.93).