Menopausal Hormone Therapy: Modern Study Finds No Increased Mortality Risk

For women navigating menopause, hormone therapy (HT) offers relief from debilitating symptoms like hot flashes and sleep disturbances. However, concerns about potential long-term health risks have led to declining use of HT over the past two decades. Now, a large-scale Danish study offers reassuring news: menopausal hormone therapy is not associated with an increased risk of death, even with long-term use.

Large Danish Study Provides Reassurance

Published in The BMJ, the study analyzed nationwide health records of over 876,805 Danish women born between 1950 and 1977, following them from age 45 for a median of just over 14 years. Researchers excluded women with pre-existing conditions that could confound the results, such as prior cancers, liver disease, or a history of blood clots. The findings support current medical guidelines recommending hormone therapy for women with moderate to severe menopausal symptoms who have no medical reasons to avoid it.

Key Findings of the Study

• No Increased Mortality Risk: After adjusting for factors like age, education, income, health conditions, and lifestyle, the study found no significant difference in the risk of death between women who used hormone therapy and those who never used it.
• Duration of Use: The analysis revealed no increased risk of death regardless of the duration of hormone therapy use, even among women who used it for 10 years or more.
• Cause of Death: There were no clear differences in mortality from specific causes, including cardiovascular disease, stroke, or cancer, between the groups.
• Survival Benefit After Oophorectomy: Women aged 45 to 54 who underwent bilateral oophorectomy (removal of both ovaries) for non-cancerous conditions experienced a significant survival benefit when using menopausal hormone therapy, with a 27–34% lower risk of death compared to those who did not.
• Transdermal Administration: The study suggested a possible association between transdermal hormone therapy (patches or gels) and a slightly lower risk of death, but researchers emphasize this finding requires further investigation.

Understanding Hormone Therapy and Menopause

Menopausal hormone therapy, also known as hormone replacement therapy (HRT), works by replenishing the estrogen and progesterone levels that decline during menopause. Hormone therapy is commonly prescribed to alleviate symptoms such as hot flashes, sleep problems, mood swings, and depression. Despite its effectiveness, concerns about safety have led to decreased usage.

Study Limitations and Future Research

The researchers acknowledge that this study is observational and cannot prove a direct causal relationship between hormone therapy and mortality. However, the large sample size and comprehensive data analysis strengthen the findings. Further research is needed to confirm the potential benefits of transdermal hormone therapy and to better understand the survival benefit observed in women who have undergone bilateral oophorectomy.

What This Means for Women Considering Hormone Therapy

This study provides valuable evidence to support informed decision-making for women considering hormone therapy. The findings suggest that, for many women, the benefits of symptom relief outweigh the potential risks. Women should discuss their individual circumstances and medical history with their healthcare provider to determine if hormone therapy is the right choice for them.

As reported by Politiken, this research offers a significant step towards rehabilitating the reputation of hormone therapy after years of strict safety warnings.