To determine the association between midlife insulin levels and the incidence of vasomotor symptoms and specific reproductive hormone trajectories (estradiol, FSH, testosterone) during the menopausal transition.
Key Findings:
Higher insulin levels at age 47 predicted earlier onset and longer duration of hot flashes and night sweats, suggesting a significant metabolic influence.
Elevated insulin was associated with a greater rise in testosterone levels, indicating potential hormonal interactions.
BMI showed complementary but distinct associations with menopausal changes compared to insulin, highlighting the multifaceted nature of metabolic health.
Interpretation:
Elevated fasting insulin levels in perimenopausal women are predictive of earlier and prolonged vasomotor symptoms, indicating a potential metabolic influence on menopausal experiences.
Limitations:
The study's cross-sectional nature limits causal inferences, making it difficult to establish direct relationships.
Insulin levels were assessed at a single age point, which may not represent all participants' menopausal stages, potentially skewing results.
Conclusion:
Elevated insulin levels may serve as an early indicator of vasomotor symptom severity during the menopausal transition, highlighting the importance of metabolic health in women's midlife experiences and suggesting avenues for future research and clinical interventions.
