Correlates of change in postmenopausal estrogen use in a population-based study

Area of Science:

• Reproductive Health
• Endocrinology
• Epidemiology

Background:

• Postmenopausal estrogen use declined sharply in the late 1970s, potentially due to fears of an endometrial cancer link.
• Observational studies on hormone therapy require understanding factors influencing its use to evaluate health outcomes accurately.

Purpose of the Study:

• To identify predictors of changes in postmenopausal estrogen use between 1974-1981.
• To determine if characteristics differed between women initiating postmenopausal estrogen use and those who did not.

Main Methods:

• A cohort of 310 postmenopausal women was studied from 1974-1981.
• Statistical analysis evaluated the impact of hysterectomy and other factors on estrogen use changes.

Main Results:

• The presence of an intact uterus was the strongest predictor for discontinuing postmenopausal estrogen use.
• Absence of a uterus was the sole strong predictor for initiating postmenopausal estrogen use.
• Women discontinuing use were older and heavier, but otherwise similar to continuers.

Conclusions:

• Fear of endometrial cancer appears to have been the main driver of reduced postmenopausal estrogen use during this period.
• Hysterectomy status was the key differentiator in postmenopausal estrogen use initiation and cessation.
• Other patient characteristics did not significantly predict initiation of postmenopausal estrogen use.