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Published on: October 13, 2016
Conversion between the Rowland Universal Dementia Assessment Scale and Mini-Mental State Examination test scores in
Alfonso Delgado-Álvarez1,2, Maria Valles-Salgado1, Cristina Delgado-Alonso1
1Department of Neurology, Hospital Clinico San Carlos, San Carlos Institute for Health Research (IdiSSC), Universidad Complutense de Madrid, Madrid, Spain.
Introduction:
Despite the Rowland Universal Dementia Assessment Scale (RUDAS) having significant advantages as a cognitive screening tool, particularly for minority populations, the Mini-Mental State Examination (MMSE) test is the most widely used test for cognitive screening in Alzheimer's disease (AD). This study aimed to develop a conversion table to predict MMSE scores from observed RUDAS scores, allowing an easy-to-use method to compare both screening tests.
Methods:
The equipercentile equating method was used to develop the conversion table using a training sample consisting of cognitively intact participants and individuals with early-stage AD. The resulting conversion table was validated in two samples, comprising participants from majority and minority populations assessed in Spanish.
Results:
The conversion table demonstrated excellent reliability with intraclass correlation coefficients of.92 in both validation samples.
Conclusion:
This study provides a conversion table between RUDAS and MMSE scores, improving the comparability of these cognitive screening tools for use in clinical and research purposes.
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