Researchers conducted one of the largest studies examining the relationship between hormone replacement therapy and dementia risk in postmenopausal women. The study tracked over 180,000 women in the UK over an average of 13 years, during which approximately 4,000 dementia cases were identified. Women who had used HRT for at least one year showed reduced dementia risk compared to those who never used the therapy.
The analysis revealed a 10% lower risk of developing any type of dementia among HRT users and a 16% lower risk specifically for Alzheimer’s disease. The protective effect was most pronounced in women who had undergone surgical menopause, with a 26% reduction in dementia risk. Women with lower lifetime oestrogen exposure—those who started menstruating late or experienced early menopause—also appeared to benefit more substantially from HRT use, showing a 16% lower dementia risk.
Genetic factors emerged as another important consideration. Women carrying the Apoe4 gene variant, which increases Alzheimer’s risk, showed stronger associations between HRT use and reduced dementia development. Researchers noted this finding is particularly significant because carriers of this gene variant typically have fewer established prevention options.
The study authors acknowledged important limitations in their research design. The findings were based on observational data rather than randomised-controlled trials, meaning a causal link cannot be definitively established. Additionally, HRT users in the study had higher average education levels than non-users, raising the possibility that unmeasured differences between groups may have influenced the results, even after accounting for socioeconomic factors.
Experts emphasized that additional research is needed to establish causation and determine which specific forms of HRT may be effective. Medical professionals recommended that individuals considering starting or stopping HRT should consult with their healthcare provider to discuss the potential benefits and risks specific to their circumstances.
Article Attribution | Read More at Article Source
Article summary produced by Claude AI