tetano
Editor, Senior Moderator
Clin Infect Dis. 2013 Apr 11. [Epub ahead of print]
Lack of Association of Guillain-Barre Syndrome with Vaccinations.
Baxter R, Bakshi N, Fireman B, Lewis E, Ray P, Vellozzi C, Klein NP.
Source
Kaiser Permanente Vaccine Study Center, Oakland, CA.
Abstract
Background. Guillain-Barr? syndrome (GBS) is an acute polyradiculoneuropathy, thought to be an autoimmune. While cases of GBS have been reported following a wide range of vaccines, a clear association has only been established with the 1976 H1N1 inactivated influenza vaccine. Methods. We identified hospitalized GBS cases from Kaiser Permanente Northern California from 1995 through 2006. The medical record of each suspected case was Neurologist-reviewed according to the Brighton Collaboration GBS case definition; only confirmed cases were included in the analyses, and cases of Miller Fisher syndrome (a variant of GBS) were excluded. Using a case-centered design, we compared the odds of vaccination in the 6 and 10 weeks prior to onset of GBS to the odds of vaccination during the same time intervals in all vaccinated individuals in the entire KPNC population. Results. We confirmed 415 incident cases of GBS (including Brighton levels 1, 2, and 3) during the study period, which included more than 30 million person-years. Incidence peaked during the winter months. The odds ratio of influenza vaccination within a six week interval prior to GBS, compared with the prior 9 months was 1.1 (95% CI 0.4-3.1). The risk in the 6-week interval compared to the prior 12 months for tetanus diphtheria combination, 23-valent pneumococcal polysaccharide, and for all vaccines combined was 1.4 (95% CI 0.3-4.5), 0.7 (95% CI 0.1-2.9), and 1.3 (95% CI 0.8-2.3), respectively. Conclusions. In this large retrospective study, we did not find evidence of an increased risk of GBS following vaccinations of any kind, including influenza vaccination.
PMID:
23580737
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23580737
Lack of Association of Guillain-Barre Syndrome with Vaccinations.
Baxter R, Bakshi N, Fireman B, Lewis E, Ray P, Vellozzi C, Klein NP.
Source
Kaiser Permanente Vaccine Study Center, Oakland, CA.
Abstract
Background. Guillain-Barr? syndrome (GBS) is an acute polyradiculoneuropathy, thought to be an autoimmune. While cases of GBS have been reported following a wide range of vaccines, a clear association has only been established with the 1976 H1N1 inactivated influenza vaccine. Methods. We identified hospitalized GBS cases from Kaiser Permanente Northern California from 1995 through 2006. The medical record of each suspected case was Neurologist-reviewed according to the Brighton Collaboration GBS case definition; only confirmed cases were included in the analyses, and cases of Miller Fisher syndrome (a variant of GBS) were excluded. Using a case-centered design, we compared the odds of vaccination in the 6 and 10 weeks prior to onset of GBS to the odds of vaccination during the same time intervals in all vaccinated individuals in the entire KPNC population. Results. We confirmed 415 incident cases of GBS (including Brighton levels 1, 2, and 3) during the study period, which included more than 30 million person-years. Incidence peaked during the winter months. The odds ratio of influenza vaccination within a six week interval prior to GBS, compared with the prior 9 months was 1.1 (95% CI 0.4-3.1). The risk in the 6-week interval compared to the prior 12 months for tetanus diphtheria combination, 23-valent pneumococcal polysaccharide, and for all vaccines combined was 1.4 (95% CI 0.3-4.5), 0.7 (95% CI 0.1-2.9), and 1.3 (95% CI 0.8-2.3), respectively. Conclusions. In this large retrospective study, we did not find evidence of an increased risk of GBS following vaccinations of any kind, including influenza vaccination.
PMID:
23580737
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23580737