Abstract
Background
Few studies have examined the effect of anti-dementia drugs (i.e., acetylcholinesterase inhibitors and N-methyl-d-aspartate receptor antagonists) on gait performance. Past studies have focused on the stride time (i.e., gait cycle duration) but not on the mental imagery of gait.
Objectives
To compare mental imagery of gait and spatiotemporal gait parameters in patients with dementia [i.e., Alzheimer’s disease (AD) and non-AD] before and after the use of anti-dementia drugs (i.e., acetylcholinesterase inhibitors and memantine) and in controls (i.e., patients with dementia who did not take anti-dementia drugs).
Methods
A total of 112 patients (mean age 82.5 ± 4.2 years, 68.8 % female) with mild-to-moderate AD and non-AD dementia were included in this non-randomized open-label trial (n = 56 in the Intervention group, and n = 56 in the Control group matched for age, sex, and stage and type of dementia) nested in a cohort study (mean follow-up 238.5 ± 79.8 days). Mental imagery of gait was assessed with the actual and imagined Timed Up and Go tests (aTUG and iTUG) and the difference between aTUG and iTUG (i.e., delta-TUG). Spatiotemporal gait parameters were measured with the GAITRite® system during normal walking.
Results
Participants in the Intervention group had a longer iTUG time (p < 0.001) and a lower delta-TUG value (p = 0.001) at the follow-up compared with those in the Control group. There was a significant increase in iTUG (p = 0.001) and decrease in delta-TUG (p < 0.001) from baseline to the follow-up only in the Intervention group. Multiple linear regression showed that the use of anti-dementia drugs was associated with a longer iTUG time and a lower delta-TUG value (best performance, p < 0.002).
Conclusions
Our findings showed an improvement in mental imagery of gait with the use of anti-dementia drugs, but no changes in actual gait performance.
Trial registration
NCT01315704.
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Acknowledgments
The authors are grateful to the participants for their cooperation. Dr. Beauchet had full access to the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analyses. Study concept and design: Drs. Beauchet and Allali. Acquisition of data: Drs. Beauchet and Annweiler. Analysis and interpretation of data: Drs. Beauchet and Allali. Drafting of the manuscript: Drs. Beauchet and Allali. Critical revision of the manuscript for important intellectual content: Drs. Annweiler, Barden, Liu-Ambrose, Chester, Szturm, Grenier, Léonard, and Bherer. Statistical expertise: Dr. Beauchet. Administrative, technical, or material support: Drs. Beauchet and Annweiler. Study supervision: Drs. Beauchet and Allali.
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No funding was received for the preparation of this manuscript.
Conflict of interest
Drs. Beauchet, Barden, Liu-Ambrose, Chester, Annweiler, Szturm, Grenier, Léonard, Louis Bherer, and Allali confirm that they have no conflict of interest.
Ethics approval and consent to participate
The study was conducted in accordance with the ethical standards set forth in the Helsinki Declaration (1983). The local ethical committee of Angers, France approved the study protocol. Informed consent for participation in the study was obtained from all participants. The trial registration number is NCT01315704.
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Beauchet, O., Barden, J., Liu-Ambrose, T. et al. Anti-Dementia Drugs, Gait Performance and Mental Imagery of Gait: A Non-Randomized Open-Label Trial. Drugs Aging 33, 665–673 (2016). https://doi.org/10.1007/s40266-016-0391-0
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DOI: https://doi.org/10.1007/s40266-016-0391-0