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Immunisation and the sudden infant death syndrome. New Zealand Cot Death Study Group
E A Mitchell1, A W Stewart, M Clements
1University of Auckland, Department of Paediatrics, New Zealand.
Insights
Infant immunisation does not increase the risk of sudden infant death syndrome (SIDS). In fact, infants who were not vaccinated were at a higher risk for SIDS, suggesting a protective effect.
Area of Science:
- Pediatrics
- Immunology
- Public Health
Background:
- Sudden Infant Death Syndrome (SIDS) remains a significant concern in infant mortality.
- The relationship between childhood immunisations and SIDS risk has been a subject of public and scientific inquiry.
Purpose of the Study:
- To investigate the association between infant immunisation status and the risk of SIDS.
- To determine if immunisation influences the likelihood of SIDS.
Main Methods:
- A large-scale, nationwide case-control study design was employed.
- Immunisation status was assessed using parental-held vaccination records.
Main Results:
- Infants lacking immunisations at 6 weeks, 3 months, and 5 months showed an increased risk of SIDS.
- After adjusting for confounding factors, unvaccinated infants at 6 weeks had a relative SIDS risk of 2.1 (95% CI = 1.2, 3.5).
- A reduced chance of SIDS was observed in the four days following immunisation (OR = 0.5; 95% CI = 0.2 to 0.9).
Conclusions:
- Childhood immunisation does not elevate the risk of SIDS.
- Evidence suggests that immunisation may offer a protective effect against SIDS.
Aims:
To examine the relation between immunisation and the risk of sudden infant death syndrome (SIDS).
Methods:
A large nationwide case-control study. Parental held records were used to measure immunisation status.
Results:
Infants were at increased risk of SIDS if they had not received the 6 week, 3 month, and 5 month immunisations. After controlling for potential confounding variables, including those which measured health care use and infant illness, the relative risk of SIDS for infants not being immunised at 6 weeks was 2.1 (95% confidence interval = 1.2, 3.5). Four percent of cases died within four days of immunisation and 7.6% of control infants had been immunised within four days of the nominated date. There was a reduced chance of SIDS in the four days immediately following immunisation (OR = 0.5; 95% CI = 0.2 to 0.9).
Conclusions:
Immunisation does not increase the risk of SIDS and may even lower the risk.