The Cognition and Flow Study: A Feasibility Randomized Controlled Trial of the Effects of Cognitive Training on Cerebral Blood Flow.
J Alzheimers Dis
; 80(4): 1567-1581, 2021.
Article
em En
| MEDLINE
| ID: mdl-33720895
ABSTRACT
BACKGROUND:
Cognitive training (CT) has demonstrated benefits for healthy older adults (HG) and mild cognitive impairment (MCI), but the effects on vascular function are unknown.OBJECTIVE:
This is a feasibility trial investigating the effects of CT on cerebral blood flow velocity (CBFv).METHODS:
Twenty HG, 24 with Alzheimer's disease (AD), and 12 with MCI were randomized to 12 weeks of multi-domain CT or control. Outcomes included cognition (Addenbrooke's Cognitive Examination III), mood, quality of life (QoL), physical, and neurovascular function (transcranial Doppler ultrasonography measured task activation of CBFv responses). Data are presented as mean difference (MD) and 95% confidence interval (CI).RESULTS:
47 participants completed the trial. There were three dropouts from the training arm in the AD group, and one in the HG group. The intervention was acceptable and feasible to the majority of participants with a high completion rate (89%). The dropout rate was higher among participants with dementia. Few changes were identified on secondary analyses, but QoL was significantly improved in HG post-training (MD 4.83 [95% CI 1.13, 8.54]). CBFv response rate was not significantly different in HG (MD 1.84 [95% CI -4.81, 1.12]), but a significant increase was seen in the patient group (MD 1.79 [95% CI 0.005, 3.58]), requiring sample sizes of 56 and 84 participants respectively for a fully-powered trial.CONCLUSION:
A 12-week CT program was acceptable and feasible in HG, AD, and MCI. CT may be associated with alterations in vascular physiology which require further investigation in an appropriately powered randomized controlled trial.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
1_ASSA2030
Base de dados:
MEDLINE
Assunto principal:
Encéfalo
/
Doença de Alzheimer
/
Disfunção Cognitiva
Tipo de estudo:
Clinical_trials
Aspecto:
Patient_preference
Limite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
País/Região como assunto:
Europa
Idioma:
En
Revista:
J Alzheimers Dis
Ano de publicação:
2021
Tipo de documento:
Article