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Overview

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continued...

Long-term use of oral contraceptives

Based on solid evidence, long-term use of oral contraceptives is associated with increased risk of cervical cancer.

Magnitude of Effect: Among HPV-infected women, those who used oral contraceptives for 5 to 9 years have approximately three times the incidence of invasive cancer, and those who used them for 10 years or longer have approximately four times the risk.[2]

Study Design: Evidence obtained from cohort or case-control studies.

Internal Validity: Good.

Consistency: Good.

External Validity: Good.

References:

Muñoz N, Franceschi S, Bosetti C, et al.: Role of parity and human papillomavirus in cervical cancer: the IARC multicentric case-control study. Lancet 359 (9312): 1093-101, 2002.
Moreno V, Bosch FX, Muñoz N, et al.: Effect of oral contraceptives on risk of cervical cancer in women with human papillomavirus infection: the IARC multicentric case-control study. Lancet 359 (9312): 1085-92, 2002.

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WebMD Public Information from the National Cancer Institute

Last Updated: October 07, 2011

This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.