Validation of Four Methods for Converting Scores on the Montreal Cognitive Assessment to Scores on the Mini-Mental State Examination-2Validation of Four Methods for Converting Scores on the Montreal Cognitive Assessment to Scores on the Mini-Mental State Examination-2
- Other Titles
- Validation of Four Methods for Converting Scores on the Montreal Cognitive Assessment to Scores on the Mini-Mental State Examination-2
- Authors
- Kang Sung Hoon; Park Moon Ho
- Issue Date
- 2021
- Publisher
- 대한치매학회
- Keywords
- Conversion; Mini-Mental State Examination; Montreal Cognitive Assessment; Validation
- Citation
- Dementia and Neurocognitive Disorders(대한치매학회지), v.20, no.4, pp.41 - 51
- Indexed
- KCI
- Journal Title
- Dementia and Neurocognitive Disorders(대한치매학회지)
- Volume
- 20
- Number
- 4
- Start Page
- 41
- End Page
- 51
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/138273
- DOI
- 10.12779/dnd.2021.20.4.41
- ISSN
- 1738-1495
- Abstract
- Background and Purpose: There are many methods for converting scores from the Montreal Cognitive Assessment (MoCA) to those on the Mini-Mental State Examination (MMSE). In this study we aimed to validate 4 methods that convert the full score range (0–30 points) of the MoCA to an equivalent range for the MMSE.
Methods: We examined the medical records of 506 subjects who completed the MoCA and MMSE-second edition (MMSE-2) on the same day. For the validation index, we calculated mean, median, and root-mean-squared error (RMSE) of the difference between true and equivalent MMSE-2 scores. We also calculated intraclass correlation coefficients (ICCs), the Bland-Altman plot, and the generalizability coefficient between true and equivalent MMSE-2 scores for reliability. We compared the ICCs according to age, sex, education, MMSE, and cognitive-status subgroups. For accuracy, we evaluated a ±2 point difference between the true and equivalent MMSE-2 scores.
Results: The 4 conversion methods had a mean of −0.79 to −0.05, a median of −1 to 0, and an RMSE of 2.61–2.94 between true and equivalent MMSE-2 scores. All conversion methods had excellent reliability, with an ICC greater than 0.75 between true and equivalent MMSE-2 scores. These results were almost maintained in the subgroup analyses. These conversion methods provided more than 65% accuracy within ±2 points of the true MMSE-2 scores.
Conclusions: We suggest that these 4 conversion methods are applicable for converting MoCA scores to MMSE-2 scores. They will greatly enhance the usefulness of existing cognitive data in clinical and research settings.
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