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  • Title: 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.
    Author: Paquay L, De Lepeleire J, Schoenmakers B, Ylieff M, Fontaine O, Buntinx F.
    Journal: Int J Geriatr Psychiatry; 2007 Apr; 22(4):286-93. PubMed ID: 17022109.
    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). CONCLUSIONS: CPS and MMSE demonstrated similar performance to detect cognitive impairment in nursing home residents.
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