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Published in: Journal of Neurology 12/2021

Open Access 01-12-2021 | Parkinson's Disease | Original Communication

Memory enhancement by multidomain group cognitive training in patients with Parkinson’s disease and mild cognitive impairment: long-term effects of a multicenter randomized controlled trial

Authors: Nele Schmidt, Inken Tödt, Daniela Berg, Christian Schlenstedt, Ann-Kristin Folkerts, Anja Ophey, Karina Dimenshteyn, Saskia Elben, Lars Wojtecki, Inga Liepelt-Scarfone, Claudia Schulte, Patricia Sulzer, Carsten Eggers, Elke Kalbe, Karsten Witt

Published in: Journal of Neurology | Issue 12/2021

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Abstract

Background

Meta-analyses indicate positive effects of cognitive training (CT) in patients with Parkinson’s disease (PD), however, most previous studies had small sample sizes and did not evaluate long-term follow-up. Therefore, a multicenter randomized controlled, single-blinded trial (Train-ParC study) was conducted to examine CT effects in PD patients with mild cognitive impairment (PD-MCI). Immediately after CT, an enhancement of executive functions was demonstrated. Here, we present the long-term results 6 and 12 months after CT.

Methods

At baseline, 64 PD-MCI patients were randomized to a multidomain CT group (n = 33) or to a low-intensity physical activity training control group (PT) (n = 31). Both interventions included 90 min training sessions twice a week for 6 weeks. 54 patients completed the 6 months (CT: n = 28, PT: n = 26) and 49 patients the 12 months follow-up assessment (CT: n = 25, PT: n = 24). Primary study outcomes were memory and executive functioning composite scores. Mixed repeated measures ANOVAs, post-hoc t tests and multiple regression analyses were conducted.

Results

We found a significant time x group interaction effect for the memory composite score (p = 0.006, η2 = 0.214), but not for the executive composite score (p = 0.967, η2 = 0.002). Post-hoc t tests revealed significant verbal and nonverbal memory improvements from pre-intervention to 6 months, but not to 12 months follow-up assessment in the CT group. No significant predictors were found for predicting memory improvement after CT.

Conclusions

This study provides Class 1 evidence that multidomain CT enhances memory functioning in PD-MCI after 6 months but not after 12 months, whereas executive functioning did not change in the long-term.

Clinical trial registration

German Clinical Trials Register (ID: DRKS00010186), 21.3.2016 (The study registration is outlined as retrospective due to an administrative delay. The first patient was enrolled three months after the registration process was started. A formal confirmation of this process from the German Clinical Trials Register can be obtained from the authors.)
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Metadata
Title
Memory enhancement by multidomain group cognitive training in patients with Parkinson’s disease and mild cognitive impairment: long-term effects of a multicenter randomized controlled trial
Authors
Nele Schmidt
Inken Tödt
Daniela Berg
Christian Schlenstedt
Ann-Kristin Folkerts
Anja Ophey
Karina Dimenshteyn
Saskia Elben
Lars Wojtecki
Inga Liepelt-Scarfone
Claudia Schulte
Patricia Sulzer
Carsten Eggers
Elke Kalbe
Karsten Witt
Publication date
01-12-2021
Publisher
Springer Berlin Heidelberg
Published in
Journal of Neurology / Issue 12/2021
Print ISSN: 0340-5354
Electronic ISSN: 1432-1459
DOI
https://doi.org/10.1007/s00415-021-10568-9

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