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You are here: Home / RESEARCH . . . . / Cancer Research / Effect of oral contraceptives on risk of cervical cancer in women with human papillomavirus infection: the IARC multicentric case-control study*

Effect of oral contraceptives on risk of cervical cancer in women with human papillomavirus infection: the IARC multicentric case-control study*

February 15, 2011 By admin

Dr Victor Moreno MD F Xavier Bosch MD, Nubia Muñoz MD, ProfChris JLM Meijer MD, Prof Keerti V Shah MD, Jan MM Walboomers PhD, Rolando Herrero MD, Silvia Franceschi MD, and for the International Agency for Research on Cancer (IARC) Multicentric Cervical Cancer Study Group

Summary

Background

Use of oral contraceptives could increase risk of cervical cancer; however the effect of human papillomavirus (HPV), the main cause of cervical cancer, is not usually taken into account. We aimed to assess how use of oral contraceptives affected risk of cervical cancer in women who tested positive for HPV DNA.

Methods

We pooled data from eight case-control studies of patients with histologically confirmed invasive cervical carcinoma (ICC) and from two studies of patients with carcinoma in situ (ISC). Information about use of oral contraceptives was obtained from personal interviews. Effects were estimated as odds ratios, with logistic-regression models adjusted for possible confounders.

Findings

1465 of 1561 (94%) patients with ICC, 211 of 292 (72%) with ISC, and 255 of 1916 (13%) controls were positive for HPV DNA. Compared with never-users, patients who had used oral contraceptives for fewer than 5 years did not have increased risk of cervical cancer (odds ratio 0·73; 95% Cl 0·52–1·03). The odds ratio for use of oral contraceptives was 2·82 (95% Cl 1·46–5·42) for 5–9 years, and 4·03 (2·09–8·02) for use for 10 years or longer, and these risks did not vary by time since first or last use.

Interpretation

Long-term use of oral contraceptives could be a cofactor that increases risk of cervical carcinoma by up to four-fold in women who are positive for cervical HPV DNA. In the absence of worldwide information about HPV status, extra effort should be made to include long-term users of oral contraceptives in cervical screening programmes.

Published online March 27, 2002. http://image.thelancet.com/extras/01art3030web.pdf

Access entire study here.

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Filed Under: Cancer Research, Human Papillomavirus Research Tagged With: HPV DNA, increased risk of cervical carcinoma, oral contraceptives

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HPV Vaccine VAERS Reports

Description 12/14/2019  TOTAL
Disabled 3,092
Deaths 523
Did Not Recover 13,072
Abnormal Smear 695
Cervical Cancer 186
Infertility 52
Life-threatening 1,001
Emergency Room 15,419
Hospitalized 6,448
Extended Hosp. Stay 304
Serious 9,497
Total Adverse Events 64,270

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