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Observational studies have suggested that arterial distensibility decreases during menopause; however, its relationship with hormone therapy use remains controversial. We prospectively studied distensibility and hormone therapy use at different menopause stages.One hundred sixty-one women (aged between 42 and 61 y) without cardiovascular disease underwent carotid artery measurements by ultrasound to calculate distensibility index at baseline and 3 years later. Menopause stage was classified at each visit as premenopausal, perimenopausal, and postmenopausal. Across 3 years of prospective observation, women were classified as remaining premenopausal, remaining postmenopausal, or transitioning (defined as change from premenopausal to perimenopausal, from premenopausal to postmenopausal, from perimenopausal to perimenopausal, or from perimenopausal to postmenopausal).Distensibility declined across time at all menopause stages (P0.0001). Compared with postmenopausal women, premenopausal and transitioning/no hormone therapy women had more than twice the decline in distensibility index (P = 0.06 and P = 0.016, respectively), whereas transitioning/hormone therapy women did not differ in distensibility decline (P = 0.28). In a multivariate model, change in systolic blood pressure (P0.0001) and change in pulse pressure (P = 0.004) were independent predictors of distensibility index change and served as effect modulators. In an adjusted model, women in the premenopausal and transitioning/no hormone therapy groups had a significantly faster decline in distensibility index (P = 0.002 and P = 0.001, respectively) compared with postmenopausal women, whereas the transitioning/hormone therapy group did not (P = 0.21).These findings confirm that the menopausal transition is associated with reduced vascular compliance. Hormone therapy is associated with better arterial distensibility only during the menopausal transition. Additional prospective studies are needed to confirm these findings and to determine whether hormone therapy use beyond the menopausal transition is related to distensibility.

Changes in cognitive function in women with breast cancer are frequently attributed to adjuvant therapy.1–3 The basis for these changes is likely to be multifactorial and is not completely understood. Moreover, results of longitudinal studies that include pretreatment cognitive assessments indicate that, before the start of adjuvant therapy, some women with breast cancer perform more poorly in cognitive measures than their healthy counterparts, suggesting that other factors influence pretreatment cognition.3–6 Multiple factors may predict pretreatment cognitive function in women with breast cancer, including their lifetime exposure to hormones.7 Substantial biological evidence indicates that estrogen has a positive influence on brain functioning, although, clinically, evidence for a relationship between estrogen and cognitive function is conflicting.8,9 The basis for this conflicting evidence may partly reflect a failure to take into account estrogen exposure factors during the course of a woman’s life. The influence of estrogen on the brain seems to begin prenatally and persists throughout a woman’s life.10 Endogenous factors (such as parity, age at menarche, and menopause or, collectively, the number of reproductive years) and exogenous factors (such as oral contraceptive use and hormone therapy [HT] use) all contribute to a woman’s lifetime exposure to hormones. Cognitive benefits of estrogen exposure may be specific for certain domains of cognitive function. Results of several studies suggest that greater lifetime exposure to estrogen is associated with better verbal memory in healthy women.11,12 Others have found that lifetime estrogen exposure is associated with better global cognitive function,13,14 psychomotor efficiency, concentration,15 and verbal attention14 in women. Although estrogen exposure seems to have cognitive benefits for women, exposure to hormones, such as estrogen, also places them at greater risk for breast cancer.16 However, a closer examination of specific factors that influence estrogen exposure during the course of a woman’s life may reveal that individual estrogen exposure factors have differential effects on cognitive function. Examining the influence of the differential effects of estrogen exposure on cognitive function may help to explain pretreatment cognitive function in women with breast cancer. Thus, we examined cognitive function in women with breast cancer before their initiation of systemic adjuvant therapy and compared them with healthy women to determine whether factors related to a lifetime exposure to hormones were associated with poorer cognitive function before therapy. We hypothesized that factors associated with less estrogen exposure (shorter reproductive life and parity) are associated with poorer cognitive function, particularly verbal memory, in women with breast cancer compared with healthy women and, conversely, factors associated with greater estrogen exposure (oral contraceptive use and HT use) are associated with better cognitive function, particularly verbal memory, in women with breast cancer.

Objective: Hormones have been implicated as modulators of cognitive functioning. For instance, results of our previous work in women with breast cancer showed that cognitive impairment was more severe and involved more memory domains in those who received adjuvant tamoxifen therapy compared with women who received chemotherapy alone or no adjuvant therapy. Recently aromatase inhibitors such as anastrozole have been used in lieu of tamoxifen for the adjuvant treatment of postmenopausal women with hormone receptor-positive, early-stage breast cancer. Plasma estrogen levels are significantly lower in women who receive anastrozole compared with those who receive tamoxifen. We hypothesized, therefore, that anastrozole would have a more profound effect on cognitive function than tamoxifen, a mixed estrogen agonist/antagonist. Design: To test this hypothesis we compared cognitive function in women with early-stage breast cancer who received tamoxifen with those who received anastrozole therapy in a cross-sectional study. We evaluated cognitive function, depression, anxiety, and fatigue in 31 postmenopausal women with early-stage breast cancer who were between the ages of 21 and 65 years and treated with tamoxifen or anastrozole for a minimum of 3 months. Results: The results showed that women who received anastrozole had poorer verbal and visual learning and memory than women who received tamoxifen. Conclusions: Additional, prospective studies are needed to validate and confirm the changes in cognitive function associated with hormone therapy for breast cancer.