Document Detail


No evidence for links between autism, MMR and measles virus.
MedLine Citation:
PMID:  15259839     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: We examined whether, in the UK, there is an increased risk of autism (AD) following exposures, in early life, to: (1) wild measles; (2) live attenuated measles, alone or in combination as MMR; and (3) the alteration of the mumps strain within MMR. METHOD: We conducted time trend analyses of 2407 AD subjects born between 1959-93; and for comparison, 4640 Down's syndrome (DS) subjects born between 1966-93. Between 1968-86, we correlated variations in AD and DS births with wild measles incidence. Between 1959-93, we tested for abrupt changes in the long-term AD birth trend for the effects of introducing: (1) monovalent measles vaccines in 1968; (2) MMR immunization in 1988; and (3) the 'overnight switch' from mixed use of Urabe MMR to exclusive use of Jeryl-Lynn MMR in 1992. Incidence rate ratios (IRRs) were used as measures of association. RESULTS: We found no significant association between AD births and exposure (prenatal and postnatal up to 18 months age) to population rates of measles infections, and no 'step-up' increase in AD births associated with the introduction of monovalent measles and MMR vaccines, and changing mumps strain. An unexpected reduction in AD births of 21% (95% CI 6.9-33.3%; P=0.005) among the post-1987 birth cohorts was detected. CONCLUSION: No increased risk of AD following exposures to wild measles and vaccinations with monovalent measles, and Urabe or Jeryl-Lynn variants of MMR was detected. The precise meaning of the detected AD births reduction is unclear. Our study cannot exclude rare complications of MMR, given its correlational design.
Authors:
W Chen; S Landau; P Sham; E Fombonne
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Psychological medicine     Volume:  34     ISSN:  0033-2917     ISO Abbreviation:  Psychol Med     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-07-19     Completed Date:  2004-08-03     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  1254142     Medline TA:  Psychol Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  543-53     Citation Subset:  IM    
Affiliation:
Institute of Psychiatry, King's College and Department of Child and Adolescent Psychiatry, Guy's, King's and St Thomas's School of Medicine, University of London.
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MeSH Terms
Descriptor/Qualifier:
Autistic Disorder / epidemiology*,  virology*
Disease Notification / statistics & numerical data
Female
Great Britain / epidemiology
Humans
Immunization Programs
Male
Measles / complications*,  epidemiology*
Measles Vaccine / administration & dosage,  adverse effects*
Measles-Mumps-Rubella Vaccine / administration & dosage,  adverse effects*
Chemical
Reg. No./Substance:
0/Measles Vaccine; 0/Measles-Mumps-Rubella Vaccine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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