Ann Rehabil Med.  2017 Jun;41(3):362-375. 10.5535/arm.2017.41.3.362.

The Korean Version of the Cognitive Assessment Scale for Stroke Patients (K-CASP): A Reliability and Validity Study

• Park KH
• Lee HW
• Park KB
• Lee JY
• Cho AR
• Oh HM
• Park JH

• KMID: 2389451
• DOI: http://doi.org/10.5535/arm.2017.41.3.362

Abstract

OBJECTIVE
To develop the Korean version of the Cognitive Assessment Scale for Stroke Patients (K-CASP) and to evaluate the test reliability and validity of the K-CASP in stroke patients.
METHODS
The original CASP was translated into Korean, back-translated into English, then reviewed and compared with the original version. Thirty-three stroke patients were assessed independently by two examiners using the K-CASP twice, with a one-day interval, for a total of four test results. To evaluate the reliability of the K-CASP, intra-class correlation coefficients were used. Pearson correlations were calculated and simple regression analyses performed with the Korean version of Mini-Mental State Examination (K-MMSE) and the aphasia quotient (AQ) to assess the validity.
RESULTS
The mean score was 24.42±9.47 (total score 36) for the K-CASP and 21.50±7.01 (total score 30) for the K-MMSE. The inter-rater correlation coefficients of the K-CASP were 0.992 on the first day and 0.995 on the second day. The intra-rater correlation coefficients of the K-CASP were 0.997 for examiner 1 and 0.996 for examiner 2. In the Pearson correlation analysis, the K-CASP score significantly correlated with the K-MMSE score (r=0.825, p<0.001). The coefficients of determination (r²) of the AQ were 0.586 for the K-MMSE and 0.513 for the K-CASP in the simple regression analysis.
CONCLUSION
The K-CASP is a reliable and valid instrument for cognitive dysfunction screening in post-stroke patients. It is more applicable than other cognitive assessment tools in stroke patients with aphasia.

Keyword

Stroke; Cognition disorders; Neuropsychological tests; Validation studies

MeSH Terms

Aphasia
Cognition Disorders
Humans
Mass Screening
Neuropsychological Tests
Reproducibility of Results*
Stroke*

Figure

• 

  Fig. 1 Scatter plot of reliability with the simple regression adjusted to fit the data. All scores from the K-CASP are expressed in logits. (A) Inter-rater reliability assessed at the first day, (B) inter-rater reliability assessed at the second day, (C) intra-rater reliability assessed by examiner 1, (D) intra-rater reliability assessed by examiner 2. K-CASP, Korean version of the Cognitive Assessment Scale; ICC, intra-class correlation coefficient.

• 

  Fig. 2 Correlation between the K-MMSE score and the mean K-CASP score. K-MMSE, Korean version of Mini-Mental State Examination; K-CASP, Korean version of the Cognitive Assessment Scale; r, Pearson correlation coefficient.

• 

  Fig. 3 Correlations of the AQ, K-MMSE, and K-CASP. Simple regression analysis was performed to determine the relations. K-CASP, Korean version of the Cognitive Assessment Scale; K-MMSE, Korean version of Mini-Mental State Examination; AQ, quotient score for the Korean version-Western Aphasia Battery published by the Paradise Welfare Foundation. *p<0.001.

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