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Published on: July 18, 2013
HPV vaccine efficacy in preventing persistent cervical HPV infection: a systematic review and meta-analysis
G La Torre1, C de Waure, G Chiaradia
1Institute of Hygiene, Catholic University of the Sacred Heart-Rome, Largo F. Vito 1, 00168 Rome, Italy. giuseppe.latorre@rm.unicatt.it
Introduction:
We performed a pooled analysis of randomised clinical trials (RCT) on HPV vaccine efficacy in preventing cervical persistent infection.
Methods:
We carried out a bibliographic search on electronic databases and we selected RCT to perform the meta-analyses.
Results:
We selected five studies. The first meta-analysis, including all studies, showed an important reduction of the risk of infection from HPV 16 in vaccinated cohort [RR 0.10 (95% CI: 0.07-0.15)]. The second and third meta-analyses, including only studies on bivalent and tetravalent vaccines, showed a RR of 0.13 (95% CI: 0.09-0.20) for HPV 16 infections and a RR of 0.22 (95% CI: 0.13-0.38) for HPV 18 ones.
Discussion:
HPV vaccine efficacy in preventing persistent infection is high but there is the need for further studies on the duration of immunization and long-term vaccine efficacy.
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