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Are there specific demographic factors that increase the risk of SIDS that I should be aware of in my practice?
Answer
Guideline-Aligned (High Confidence)
Generated by iatroX. Developer: Dr Kola Tytler MBBS CertHE MBA MRCGP (General Practitioner).
Last reviewed: 17 August 2025
Yes, there are several demographic factors that increase the risk of sudden infant death syndrome (SIDS) that are important to be aware of in general practice.
- Age: The peak incidence of SIDS typically occurs between 2 and 4 months of age [Horne, 2019].
- Sex: Male infants have a slightly higher risk of SIDS compared to female infants [Horne, 2019].
- Prematurity and Low Birth Weight: Infants born prematurely or with a low birth weight are at an increased risk of SIDS [Adams et al., 2015; Horne, 2019; Kaler et al., 2020]. This aligns with the need for developmental follow-up for children born preterm 2.
- Maternal Factors:
- Maternal Smoking: Smoking during pregnancy is a significant risk factor for SIDS [Adams et al., 2015; Horne, 2019]. Postnatal care guidelines advise parents to avoid smoking around the baby to reduce SIDS risk 4.
- Maternal Drug Use: Maternal drug use is also associated with an increased risk of SIDS [Adams et al., 2015].
- Young Maternal Age: Infants born to younger mothers may have a higher risk [Adams et al., 2015].
- Socioeconomic Factors: Lower socioeconomic status is associated with an increased risk of SIDS [Horne, 2019].
- Ethnicity: Some studies indicate higher rates of SIDS in certain ethnic groups [Adams et al., 2015].
General practice teams should ensure that parents receive information on reducing the risk of SIDS, including placing the baby on their back to sleep, keeping them in a separate cot in the parents' room for the first six months, and avoiding smoking around the baby 4.
Key References
- NG217 - Epilepsies in children, young people and adults
- NG72 - Developmental follow-up of children and young people born preterm
- NG51 - Suspected sepsis: recognition, diagnosis and early management
- NG194 - Postnatal care
- (Adams et al., 2015): Sudden infant death syndrome.
- (Horne, 2019): Sudden infant death syndrome: current perspectives.
- (Kaler et al., 2020): Manifestation and Pathogenesis of Sudden Infant Death Syndrome: A Review.
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