In the case-control study associations were found in the same direction but did not reach statistical significance.
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The Influence of Hormonal Factors on the Risk of Developing Cervical Cancer and Pre-Cancer: Results from the EPIC Cohort.
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The sentences
While the IARC collaborative study found a relative risk of 1.6 for long-term OC users with a significant trend, Moreno et al . observed a stronger association (OR = 4.0).