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Guanfacine treatment for prefrontal cognitive dysfunction in older participants: a randomized clinical trial.


ABSTRACT: This study evaluated the effect of the alpha-2A-adrenoceptor agonist guanfacine on prefrontally mediated cognitive functions, as well as quality of life and global function in healthy older participants. One hundred twenty-three participants aged 75 years and older were randomly assigned to guanfacine 0.5 mg, 0.1 mg, or placebo daily for 12 weeks. The primary outcome measure was the change in z-score for 6 prefrontal executive function tasks over 12 weeks (PEF6). Neither dose of guanfacine improved PEF6 z-score relative to placebo. The rate of mean change (95% confidence interval) in PEF6 z-score over 12 weeks was 0.270 (0.159, 0.380) for placebo, compared with 0.121 (0.011, 0.232) for guanfacine 0.1 mg (p = 0.06, compared to placebo) and 0.213 (0.101, 0.324) for 0.5 mg (p = 0.47). Neither dose of guanfacine improved the quality of life or global function relative to placebo. Among common adverse events, only dry mouth was significantly more frequent on guanfacine compared to placebo. Guanfacine failed to ameliorate prefrontal cognitive function in older individuals, who were cognitively normal for age.

SUBMITTER: Barcelos NM 

PROVIDER: S-EPMC6503670 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Guanfacine treatment for prefrontal cognitive dysfunction in older participants: a randomized clinical trial.

Barcelos Nicole M NM   Van Ness Peter H PH   Wagner Allison F AF   MacAvoy Martha G MG   Mecca Adam P AP   Anderson George M GM   Trentalange Mark M   Hawkins Keith A KA   Sano Mary M   Arnsten Amy F T AFT   van Dyck Christopher H CH  

Neurobiology of aging 20180531


This study evaluated the effect of the alpha-2A-adrenoceptor agonist guanfacine on prefrontally mediated cognitive functions, as well as quality of life and global function in healthy older participants. One hundred twenty-three participants aged 75 years and older were randomly assigned to guanfacine 0.5 mg, 0.1 mg, or placebo daily for 12 weeks. The primary outcome measure was the change in z-score for 6 prefrontal executive function tasks over 12 weeks (PEF6). Neither dose of guanfacine impro  ...[more]

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