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British Medical Journal logoLink to British Medical Journal
. 1977 Aug 20;2(6085):490–493. doi: 10.1136/bmj.2.6085.490

Primary immunisation and febrile convulsions in Oxford 1972-5.

P Harker
PMCID: PMC1630885  PMID: 890364

Abstract

A three-year study of febrile convulsions in Oxford with comprehensive notification from general practice and hospitals showed a 3% risk for all children of suffering at least one febrile convulsion by the age of 5 years. Children were most at risk between 6 and 27 months, and febrile convulsions were most likely to be prolonged in children aged 9-15 months. The association between febrile convulsions and primary immunisations in the preceding 28 days was compared in case and control children, matched for age and sex. Results suggested that such association was a chance relationship with age. If association was direct, the febrile convulsion rates per 1000 immunisation doses were estimated as follows: diphtheria, pertussis, tetanus--0-09 per 1000; poliomyelitis--0-6 per 1000; and measles--0-9 per 1000. Hence if any of these vaccines had a secific causal relationship with febrile convulsions, these rates would probably have been much higher.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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