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Menstruation span--a time-limited risk factor for endometrial carcinoma
Acta Obstetricia Et Gynecologica Scandinavica
|January 1, 1986
Summary
Reproductive factors significantly impact endometrial carcinoma risk. Factors like nulliparity and late menopause increase risk, while each pregnancy lowers it, highlighting the importance of estrogen exposure duration.
Area of Science:
- Gynecology
- Oncology
- Epidemiology
Background:
- Endometrial carcinoma risk is influenced by reproductive history.
- Understanding these factors is crucial for prevention and early detection.
Purpose of the Study:
- To investigate the association between reproductive factors and endometrial carcinoma risk.
- To quantify the impact of parity and menopausal age on disease development.
Main Methods:
- A case-control study involving 254 women with endometrial carcinoma and 254 age-matched controls.
- Analysis of reproductive history, including parity, age at menarche, and age at menopause.
Main Results:
- Nulliparity and late menopause were significantly associated with increased endometrial carcinoma risk.
- Each additional full-term pregnancy reduced risk by 16%.
- A longer 'menstruation span' (total years of menstruation) correlated with higher risk, with over 39 years conferring a 4.2-fold increased risk compared to less than 25 years.
Conclusions:
- The duration of exposure to unopposed estrogen, reflected by the menstruation span, is a critical factor in endometrial carcinoma development.
- Reproductive history, particularly parity and menopausal age, plays a significant role in disease risk, with effects potentially diminishing in older age groups.