Why the study?
Do hormonal contraceptives affect the risk of breast cancer in women?
Population
153,536 women (53,297 with breast cancer and 100,239 without breast cancer) from 54 epidemiological studies
Comparison
Hormonal contraceptives / oral contraceptives vs Alternative methods / no use
Design
Other
Authors
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Broader systematic reviews of cohort studies needed to assess all oral contraceptive effects; extends evidence beyond breast cancer for balanced risk assessment.
Do hormonal contraceptives affect the risk of breast cancer in women?
The text highlights the need for systematic reviews of cohort studies to evaluate all relevant health effects of oral contraceptives beyond just breast cancer.
D L Sackett (1996) studied this question.
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