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Are the risk factors for SIDS different for preterm and term infants?
J M D Thompson1, E A Mitchell,
1Department of Paediatrics, University of Auckland, New Zealand.
Insights
Sudden infant death syndrome (SIDS) rates have decreased similarly in both preterm and term infants. However, preterm birth remains a risk factor, with similar modifiable risk factors except for parity.
Area of Science:
- Neonatal Health
- Pediatric Mortality
- Public Health Interventions
Background:
- Sudden infant death syndrome (SIDS) mortality has decreased following recommendations against prone sleeping.
- Infants born preterm exhibit higher SIDS mortality rates compared to term infants.
Purpose of the Study:
- To investigate if SIDS risk factors differ between preterm and term infants.
- To analyze the impact of SIDS prevention campaigns on mortality rates in both groups.
Main Methods:
- Analysis of longitudinal mortality data to compare SIDS rate reductions.
- Utilized data from New Zealand case-control and case-cohort studies.
- Examined SIDS risk factors in relation to infant gestational age and prevention campaigns.
Main Results:
- SIDS mortality reduction proportions were comparable between term and preterm infants.
- Identified similar SIDS risk factors for both groups, with a notable exception in parity.
- Increasing parity was a significant SIDS risk factor for term infants, but not for preterm infants.
Conclusions:
- SIDS rates declined similarly in term and preterm infants, yet preterm birth persists as a risk factor.
- Modifiable SIDS risk factors demonstrated similar effect magnitudes across both infant groups.
- Parity may represent a differential risk factor for SIDS between term and preterm infants.
- SIDS risk factor messaging remains relevant for mothers of both term and preterm infants.
Background:
Mortality from SIDS has declined since the recommendation that infants are not placed prone to sleep. SIDS mortality is higher in infants born preterm than those born at term.
Aim:
To determine if risk factors for SIDS are any different for preterm and term infants.
Methods:
Mortality data over time were used to determine whether the reduction in SIDS mortality rates had occurred equally in term and preterm infants. Data from two New Zealand studies (a case-control study and a case-cohort study) were used to determine if any differences existed in risk factors for SIDS between term and preterm infants before and after the SIDS prevention campaign.
Results:
SIDS mortality appears to have decreased by similar proportions in term and preterm infants. Risk factors for SIDS were similar in preterm and term infants, except for parity where there was a significant interaction. Increasing parity was a risk factor for SIDS in term infants but not preterm infants.
Conclusion:
SIDS rates have decreased at comparable rates in term and preterm infants, but preterm birth still remains a risk factor for SIDS. The magnitude of the odds ratios associated with modifiable risk factors were similar for both groups. There may however be a difference in risk associated with parity between term and preterm infants. The messages for risk factors for SIDS are applicable to mothers of preterm as well as term infants.
