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Abstract Title:

Risk of miscarriage with bivalent vaccine against human papillomavirus (HPV) types 16 and 18: pooled analysis of two randomised controlled trials.

Abstract Source:

BMJ. 2010;340:c712. Epub 2010 Mar 2. PMID: 20197322

Abstract Author(s):

Sholom Wacholder, Bingshu Eric Chen, Allen Wilcox, George Macones, Paula Gonzalez, Brian Befano, Allan Hildesheim, Ana Cecilia Rodríguez, Diane Solomon, Rolando Herrero, Mark Schiffman,

Article Affiliation:

Division of Cancer Epidemiology and Genetics, National Cancer Institute, 6120 Executive Blvd, Rockville, MD 20852, USA. WacholdS@mail.nih.gov

Abstract:

OBJECTIVE: To assess whether vaccination against human papillomavirus (HPV) increases the risk of miscarriage. DESIGN: Pooled analysis of two multicentre, phase three masked randomised controlled trials SETTING: Multicentre trials in several continents and in Costa Rica. PARTICIPANTS: 26 130 women aged 15-25 at enrolment; 3599 pregnancies eligible for analysis. INTERVENTIONS: Participants were randomly assigned to receive three doses of bivalent HPV 16/18 VLP vaccine with AS04 adjuvant (n=13 075) or hepatitis A vaccine as control (n=13 055) over six months. MAIN OUTCOME MEASURES: Miscarriage and other pregnancy outcomes. RESULTS: The estimated rate of miscarriage was 11.5% in pregnancies in women in the HPV arm and 10.2% in the control arm. The one sided P value for the primary analysis was 0.16; thus, overall, there was no significant increase in miscarriage among women assigned to the HPV vaccine arm. In secondary descriptive analyses, miscarriage rates were 14.7% in the HPV vaccine arm and 9.1% in the control arm in pregnancies that began within three months after nearest vaccination. CONCLUSION: There is no evidence overall for an association between HPV vaccination and risk of miscarriage. TRIAL REGISTRATION: Clinical Trials NCT00128661 and NCT00122681.

Study Type : Human Study

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Sayer Ji
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