Journal
EUROPEAN JOURNAL OF EPIDEMIOLOGY
Volume 17, Issue 8, Pages 783-787Publisher
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1015675932509
Keywords
case series analysis; epidemiology; intussusception; oral polio vaccine; vaccine reaction; vaccine safety
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Two exploratory investigations found an increased risk of intussusception after oral polio vaccine (OPV). A large, national, population-based study was undertaken in Cuba to investigate a possible association. Three hundred and thirty-five cases of intussusception in children under 2 years of age occurring in 1995-2000 were identified and their OPV records retrieved. The relative incidence (RI) of intussusception in defined periods up to 42 days after OPV in children under 1 year was estimated using the self-controlled case series method, controlling for age and season. The RI was not significantly raised in any of the time intervals examined within the 0-42 day period after OPV. For the period 0-42 days as a whole the RI was 1.11, 95% CI 0.74-1.67. This study does not support the hypothesis that OPV causes intussusception.
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