Source: Fox News
Summary
A new study published in Alzheimer’s & Dementia suggests that women who start hormone replacement therapy (HRT) between the ages of 46 and 56 may have a lower risk of dementia. The research, based on UK Biobank data of 183,450 postmenopausal women, found a 10% lower risk of all-cause dementia and a 16% lower risk of Alzheimer’s over 13 years. The association was strongest among women who started HRT in that age range and those with surgical menopause. However, the study was observational and could not prove causation. Researchers noted that HRT may not reduce dementia risk for women over 56 or those with other risk factors.
Our Reading
This guidance has been heard before.
Studies link HRT to lower dementia risk in some women.
But the data remains observational, not conclusive.
Experts caution against using HRT solely for dementia prevention.
The advice sounds familiar, but the details keep changing.
Author: Evan Null
Study Details
The study analyzed data from 183,450 postmenopausal women in the UK Biobank. The average age of participants was 60. Researchers followed them for 13 years to assess dementia risk. HRT use was linked to a 10% lower risk of all-cause dementia and a 16% lower risk of Alzheimer’s. The strongest association was found in women who started HRT between 46 and 56 years old.
Observational Limitations
The study was observational, meaning it could not prove that HRT caused the lower dementia risk. Other factors, such as overall health, lifestyle, and access to healthcare, could have influenced the results. Researchers also noted that the study did not assess the safety or side effects of HRT, nor did it look at the types or dosages of hormone therapy used.
Population Limitations
The study primarily included women of European ancestry who were financially better off. This limits the applicability of the findings to other populations. Researchers emphasized that the results may not be generalizable to all women, especially those from different ethnic or socioeconomic backgrounds.
Expert Caution
Dr. Alexa Fiffick, a family medicine physician, noted that while the study suggests a possible link, it does not prove that HRT prevents dementia. She advised against seeking HRT solely for dementia prevention. Instead, she encouraged women experiencing menopausal symptoms to discuss their options with a doctor. Fiffick also highlighted the risks of HRT, such as increased blood clot risk with oral estrogen and potential effects on breast and cardiovascular health.
Future Research
The U.K. researchers plan to conduct randomized controlled trials to confirm the findings. These trials will consider factors like estrogen-only versus combined therapy, dosage, administration method, and the APOE genotype. Dr. Fiffick expressed hope that more studies will provide clearer data for women to make informed decisions about HRT. She emphasized the importance of ongoing research to better understand the relationship between HRT and dementia risk.
