Cognitive effects of estradiol after menopause: A randomized trial of the timing hypothesis.
Neurology
; 87(7): 699-708, 2016 Aug 16.
Article
em En
| MEDLINE
| ID: mdl-27421538
ABSTRACT
OBJECTIVE:
To test the hypothesis that effects of estrogen-containing hormone therapy on cognitive abilities differ between postmenopausal women near to, and further from, menopause.METHODS:
In this randomized, double-blind, placebo-controlled trial, healthy women within 6 years of menopause or 10+ years after menopause were randomly assigned to oral 17ß-estradiol 1 mg/d or placebo. Women with a uterus received cyclic micronized progesterone vaginal gel or placebo. The primary outcome assessed at 2.5 and 5 years, compared between treatment groups, was change in a standardized composite of neuropsychological test scores assessing verbal episodic memory. Secondary outcomes assessed executive functions and global cognition.RESULTS:
A total of 567 women were included in modified intention-to-treat analyses after a mean treatment duration of 57 months. For verbal memory, the mean estradiol minus placebo standardized difference in composite scores (-0.06, 95% confidence interval -0.22 to 0.09) was not significant (2-tailed p = 0.33). Differences were similar in early and late postmenopause groups (2-tailed interaction p = 0.88). Interactions between postmenopause groups and differences between treatment groups were not significant for executive functions or global cognition.CONCLUSIONS:
Estradiol initiated within 6 years of menopause does not affect verbal memory, executive functions, or global cognition differently than therapy begun 10+ years after menopause. Estradiol neither benefits nor harms these cognitive abilities regardless of time since menopause. CLASSIFICATION OF EVIDENCE This study provides Class I evidence that estradiol initiated within 6 years of menopause does not affect cognition at 2.5 years differently than estradiol initiated 10+ years after menopause.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Terapia de Reposição de Estrogênios
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Cognição
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Estradiol
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Estrogênios
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Função Executiva
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Memória Episódica
Tipo de estudo:
Clinical_trials
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Aged
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Humans
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Middle aged
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article