Effectiveness of pertussis vaccines for adolescents and adults: case-control study
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Auteurs : Roger Baxter ; Joan Bartlett ; Ali Rowhani-Rahbar ; Bruce Fireman ; Nicola P. KleinSource :
- BMJ : British Medical Journal [ 1756-1833 ] ; 2013.
Abstract
Objective To assess the effectiveness of reduced acellular pertussis (Tdap) vaccines in adolescents and adults. Setting Kaiser Permanente Northern California. Design Case-control study. Participants All polymerase chain reaction (PCR) confirmed cases of pertussis in members aged 11 years and older from January 2006 to December 2011. We compared the Tdap vaccination status of PCR positive cases with two control groups: people testing negative for pertussis by PCR and closely matched people from the general Kaiser Permanente Northern California population. Main outcome measure PCR confirmed pertussis. The association of Tdap vaccination with the odds of pertussis infection was estimated by conditional logistic regression, with adjustment for calendar time, pertussis vaccine type received in early childhood, age, sex, race or ethnic group, and medical clinic. We calculated Tdap vaccine effectiveness as 1 minus the adjusted odds ratio. Results The study population included 668 PCR positive cases, 10 098 PCR negative controls, and 21 599 Kaiser Permanente Northern California matched controls. Tdap vaccination rates were 24.0% in PCR positive cases and 31.9% in PCR negative controls (P<0.001). The adjusted estimate of effectiveness of Tdap vaccination against pertussis was 53.0% (95% confidence interval 41.9% to 62.0%) in the comparison with PCR controls, and 64.0% (55.5% to 70.9%) in the comparison with Kaiser Permanente Northern California controls. Conclusion Tdap vaccination was moderately effective at preventing PCR confirmed pertussis among adolescents and adults.
Url:
DOI: 10.1136/bmj.f4249
Affiliations:
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Klein</name></author></analytic><monogr></monogr><series><title level="j">BMJ : British Medical Journal</title><title level="j" type="abbrev">BMJ</title><idno type="eISSN">1756-1833</idno><imprint><publisher>British Medical Journal Publishing Group</publisher><date type="published" when="2013">2013</date><biblScope unit="volume">347</biblScope></imprint></series><idno type="istex">8C1425703825425663D65F732BA86D4DDEE6F967</idno><idno type="DOI">10.1136/bmj.f4249</idno><idno type="href">bmj-347-bmj-f4249.pdf</idno><idno type="ArticleID">baxr009268</idno><idno type="local">bmj;347/jul17_1/f4249</idno></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Objective To assess the effectiveness of reduced acellular pertussis (Tdap) vaccines in adolescents and adults. Setting Kaiser Permanente Northern California. Design Case-control study. Participants All polymerase chain reaction (PCR) confirmed cases of pertussis in members aged 11 years and older from January 2006 to December 2011. We compared the Tdap vaccination status of PCR positive cases with two control groups: people testing negative for pertussis by PCR and closely matched people from the general Kaiser Permanente Northern California population. Main outcome measure PCR confirmed pertussis. The association of Tdap vaccination with the odds of pertussis infection was estimated by conditional logistic regression, with adjustment for calendar time, pertussis vaccine type received in early childhood, age, sex, race or ethnic group, and medical clinic. We calculated Tdap vaccine effectiveness as 1 minus the adjusted odds ratio. Results The study population included 668 PCR positive cases, 10 098 PCR negative controls, and 21 599 Kaiser Permanente Northern California matched controls. Tdap vaccination rates were 24.0% in PCR positive cases and 31.9% in PCR negative controls (P<0.001). The adjusted estimate of effectiveness of Tdap vaccination against pertussis was 53.0% (95% confidence interval 41.9% to 62.0%) in the comparison with PCR controls, and 64.0% (55.5% to 70.9%) in the comparison with Kaiser Permanente Northern California controls. Conclusion Tdap vaccination was moderately effective at preventing PCR confirmed pertussis among adolescents and adults.</div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Bartlett, Joan" sort="Bartlett, Joan" uniqKey="Bartlett J" first="Joan" last="Bartlett">Joan Bartlett</name><name sortKey="Baxter, Roger" sort="Baxter, Roger" uniqKey="Baxter R" first="Roger" last="Baxter">Roger Baxter</name><name sortKey="Fireman, Bruce" sort="Fireman, Bruce" uniqKey="Fireman B" first="Bruce" last="Fireman">Bruce Fireman</name><name sortKey="Klein, Nicola P" sort="Klein, Nicola P" uniqKey="Klein N" first="Nicola P" last="Klein">Nicola P. Klein</name><name sortKey="Rowhani Rahbar, Ali" sort="Rowhani Rahbar, Ali" uniqKey="Rowhani Rahbar A" first="Ali" last="Rowhani-Rahbar">Ali Rowhani-Rahbar</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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