Abstract
BackgroundThere may be changes in cognitive function in women going through the menopause. The current evidence remains unclear, however, whether these changes occur over and above those of general ageing. We aimed to evaluate the potential impact of the menopause (assessed by reproductive age and hormone levels) on cognitive function in women in mid-life accounting for the underlying effects of ageing.MethodsThe study was based on the follow up of women originally enrolled in pregnancy in a birth cohort when resident in the South West of England, UK between 1991 and 1992. Using up to three repeated measurements in 2411 women (mean age 51 at first assessment), we modelled changes in six cognitive function domains: immediate and delayed verbal episodic memory, working memory, processing speed, verbal intelligence and verbal fluency. The exposures of interest were reproductive age measured as years relative to the final menstrual period (FMP), chronological age and reproductive hormones (follicle-stimulating hormone (FSH), luteinizing hormone (LH) and anti-Müllerian hormone (AMH)).ResultsProcessing speed (− 0.21 (95% CI − 0.36 to − 0.06) standard deviation (SD) difference per 10 years since FMP), immediate verbal episodic memory (− 0.15 (95% CI − 0.35 to 0.06)) and delayed verbal episodic memory (− 0.17 (95% CI − 0.37 to 0.03)) declined with reproductive age. Reproductive hormones were not robustly associated with processing speed, but FSH and LH were both negatively associated with immediate (− 0.08 (95% CI − 0.13 to − 0.02) SD difference per SD difference in hormone level) and delayed verbal episodic memory (− 0.08 (95% CI − 0.13 to − 0.03)). There was little consistent evidence of cognitive function declining with menopause in other cognitive domains.ConclusionsOf the cognitive domains tested only verbal episodic memory declined both in relation to age since the menopause and in conjunction with the reproductive hormones that reflect the menopause. This decline was independent of normal ageing and suggests that the menopause is associated with a mild impact on this specific domain of cognitive function.
Highlights
There may be changes in cognitive function in women going through the menopause
Of the cognitive domains tested only verbal episodic memory declined both in relation to age since the menopause and in conjunction with the reproductive hormones that reflect the menopause. This decline was independent of normal ageing and suggests that the menopause is associated with a mild impact on this specific domain of cognitive function
As evidence suggests age-related decline in cognitive function may start from early- to mid-40s in both women and men [9, 10], it is possible that menopause-attributed decline reflects chronological age-related change
Summary
There may be changes in cognitive function in women going through the menopause. The current evidence remains unclear, whether these changes occur over and above those of general ageing. Many women report experiencing changes in cognitive function, such as increased forgetfulness and poor concentration, during the menopausal transition [1]. Whether these alterations in cognitive function reflect the transition per se and its associated changes in reproductive hormones, or is related to symptoms of the menopause such as disruption of sleep by vasomotor symptoms, is unclear [2,3,4]. As evidence suggests age-related decline in cognitive function may start from early- to mid-40s in both women and men [9, 10], it is possible that menopause-attributed decline reflects chronological age-related change
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