Association of bilateral oophorectomy with cognitive function in healthy, postmenopausal women

Age of bilateral oophorectomy before natural menopause was associated with worse performance in select cognitive domains in a sample of ethnically diverse, educated, healthy, postmenopausal women.

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Volume 106, Issue 3, Pages 749-756

Authors:

Keiko Kurita, Ph.D., Victor W. Henderson, M.D., M.S., Margaret Gatz, Ph.D., Jan St. John, M.P.H., Howard N. Hodis, M.D., Roksana Karim, M.B.B.S., M.S., Ph.D., Wendy J. Mack, Ph.D.

Abstract:

Objective

To investigate the association between bilateral oophorectomy and cognitive performance in healthy, older women.

Design

Retrospective analysis of clinical trial data.

Setting

Academic research institution.

Patient(s)

Healthy postmenopausal women without signs or symptoms of cardiovascular disease or diabetes (n = 926).

Intervention(s)

Randomized interventions (not the focus of this analysis) in analyzed trials included B-vitamins, soy isoflavones, oral estradiol, and matching placebos.

Main Outcome Measure(s)

Measures in five cognitive domains (executive functions, semantic memory, logical memory, visual memory, and verbal learning) and global cognitive function.

Result(s)

Using data from three clinical trials conducted under uniform conditions, bilateral oophorectomy and its timing were analyzed cross-sectionally and longitudinally in relation to cognitive function in linear regression models. Covariates included age, education, race/ethnicity, body mass index, trial, and randomized treatment (in longitudinal models). Duration of menopausal hormone use was considered as a possible mediator and effect modifier. Median age of oophorectomy was 45 years. When evaluating baseline cognition, we found that surgical menopause after 45 years of age was associated with lower performance in verbal learning compared with natural menopause. Evaluating the change in cognition over approximately 2.7 years, surgical menopause was associated with performance declines in visual memory for those who had an oophorectomy after 45 years of age and in semantic memory for those who had oophorectomy before 45 years of age compared with natural menopause. Oophorectomy after natural menopause was not associated with cognitive performance. Adjustment for duration of hormone use did not alter these associations.

Conclusion(s)

Cognitive associations with ovarian removal vary by timing of surgery relative to both menopause and age.


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Fertility and Sterility

Editorial Office, American Society for Reproductive Medicine

Fertility and Sterility® is an international journal for obstetricians, gynecologists, reproductive endocrinologists, urologists, basic scientists and others who treat and investigate problems of infertility and human reproductive disorders. The journal publishes juried original scientific articles in clinical and laboratory research relevant to reproductive endocrinology, urology, andrology, physiology, immunology, genetics, contraception, and menopause. Fertility and Sterility® encourages and supports meaningful basic and clinical research, and facilitates and promotes excellence in professional education, in the field of reproductive medicine.

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