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In young hysterectomized women, does unopposed estrogen therapy increase overall survival?

Yes. Between 2002 and 2011, a minimum of 18,601 and as many as 91,610 excess deaths occurred among hysterectomized US women aged 50 to 59 years, according to this analysis. These deaths were attributed to the avoidance of estrogen therapy (ET) in the years following publication of the initial findings of the Women's Health Initiative (WHI). (1)

Sarrel PM, Njike VY, Vinante V, Katz DL. The mortality toll of estrogen avoidance: an analysis of excess deaths among hysterectomized women aged 50 to 59 years. Am J Public Health. 2013;103(9):1583-1588.

During the 1990s, more than 90% of hysterectomized women aged 50 to 59 years used ET following the procedure. When the initial findings of the WHI were published in 2002, they prompted many women to refuse or discontinue ET--despite the fact that the initial findings concerned the use of estrogen and progestin in combination in women with an intact uterus. Today, only some 30% of women use ET after hysterectomy.

When findings from the WHI estrogen-only arm were eventually published, they revealed that ET reduces mortality among women 50 to 59 years old, compared with placebo. Although most of the reduction in mortality relates to fewer deaths from coronary heart disease, a decline in deaths from breast cancer also was seen. (2,3)

Sarrel and colleagues calculated the excess mortality among US women aged 50 to 59 that could have been prevented by ET during the decade from 2002 through 2011. Their estimates ranged from approximately 19,000 deaths to as many as 92,000 deaths.

By calling attention to the negative health consequences of estrogen avoidance in young hysterectomized women, Sarrel and colleagues have performed a valuable public service.

Plethora of WHI data may have contributed to confusion

The WHI clinical trials have produced numerous analyses in various subsets of women. The sheer volume of data may be daunting in some cases, and likely has led to a failure to distinguish between estrogen-only and estrogen-progestin therapy, which have very different safety profiles.

Further, some clinicians and many patients have overlooked the fact that the risk-benefit profile of hormone therapy (both estrogen-only and estrogen-progestin therapy) is more favorable in younger, recently menopausal women than it is in older women.

I encounter evidence of this unwarranted fear of ET in my practice, with highly symptomatic, recently menopausal women who are appropriate candidates for hormone therapy electing to refuse the most effective treatment for menopausal symptoms.

Of course, hormone therapy, like all medications, has risks as well as benefits. For example, oral ET increases the risk of venous thrombosis and stroke, and long-term use of estrogen-progestin therapy increases the risk of breast cancer. However, the overblown fears of estrogen therapy have caused many appropriate candidates to miss out on symptom relief, prevention of osteoporosis, and treatment of symptomatic genital atrophy.

FAST TRACK

As many as 92,000 deaths of hysterectomized US women aged 50 to 59 could have been prevented by estrogen therapy during the decade from 2002 through 2011

References

(1.) Rossouw JE, Anderson GL, Prentice RL, et al; Writing Group for the Women's Health Initiative Investigators. Risks and benefits of estrogen plus progestin in healthy postmenopausal women: principal results From the Women's Health Initiative randomized controlled trial. JAMA. 2002;288(3):321-333.

(2.) LaCroix AZ, Chlebowski RT, Manson JE, et al; WHI Investigators. Health outcomes after stopping conjugated equine estrogens among postmenopausal women with prior hysterectomy: a randomized controlled trial. JAMA. 2011;305(13):1305-1314.

(3.) Anderson GL, Chlebowski RI, Aragaki AK, et al. Conjugated equine estrogen and breast cancer incidence and mortality in postmenopausal women with hysterectomy: extended follow-up of the Women's Health Initiative randomized placebo-controlled trial. Lancet Oncol. 2012; 13(5):476-486.

EXPERT COMMENTARY

* Andrew M. Kaunitz, MD, Professor and Associate Chairman, Department of Obstetrics & Gynecology, University of Florida College of Medicine-Jacksonville, Jacksonville, Florida. Dr. Kaunitz serves on the OBG MANAGEMENT Board of Editors.

Dr. Kaunitz reports that he receives grant or research support from Bayer and Teva, and is a consultant to Actavis, Bayer, and Teva.

WHAT THIS EVIDENCE MEANS FOR PRACTICE

This provocative report demonstrates that wholesale avoidance of hormone therapy can have important negative public health consequences.

* ANDREW M. KAUNITZ, MD
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Title Annotation:Examining the EVIDENCE
Author:Kaunitz, Andrew M.
Publication:OBG Management
Date:Oct 1, 2013
Words:700
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