This study presents a Japanese translation of the Goldsmiths Musical Sophistication Index (Gold-MSI). The index consists of 38 self-report questions and provides a general sophistication score as well as subscale scores for Active Engagement, Perceptual Abilities, Musical Training, Singing Abilities, and Emotions. The validation of the translation with 689 native Japanese speakers indicated excellent internal consistency and test–retest reliability. Confirmatory factor analysis revealed that the bifactor model structure formulated by the original study of Gold-MSI is maintained reasonably in our data. The strengths of the Gold-MSI self-report inventory are (1) it offers a multifaceted view of musical sophistication, (2) a subset of five subscales can be used to measure different aspects of musical sophistication independently, and (3) the ease of administration as it is a self-report questionnaire. In view of the fact that this inventory and its translations increasingly contribute to research on musical expertise, skills, and abilities, having a Japanese translation may enhance future research in these areas even further.

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Aim Polypharmacy has been reported to be associated with poor outcomes, including falls and frailty, in older populations. Past studies have found that slower walking speed is a good predictor of progression to frank dementia in mild cognitive impairment (MCI). Some studies of the general population reported that polypharmacy was associated with slower gait speed; however, it remains to be elucidated whether polypharmacy affects gait speed even in individuals with MCI, who already have some deterioration in gait compared with cognitively preserved individuals. The current study explored the association between the number of medications and gait speed in older adults with MCI who have a Clinical Dementia Rating score of 0.5. Methods A total of 128 individuals with MCI were included in the present study. The participants were divided into three groups according to the number of medications they were taking: up to four medications was non‐polypharmacy; five to nine medications was polypharmacy; and ≥10 medications was hyperpolypharmacy. The background characteristics were compared by analysis of variance for numerical numbers, and by χ2 analysis for categorical factors. Multiple regression and logistic analysis were applied to investigate the association between gait speed and polypharmacy status or number of medications. Results Gait speed was significantly negatively associated with hyperpolypharmacy status and the number of medications. Slow gait speed (<1 m/s) was also significantly associated with polypharmacy status and the number of medications. Conclusions We found that polypharmacy was associated with slow gait speed in older adults with MCI. Geriatr Gerontol Int 2019; 19: 730–735.

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