Are there specific demographic factors that increase the risk of SIDS that I should be aware of in my practice?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 17 August 2025Updated: 17 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

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 .
  • Sex: Male infants have a slightly higher risk of SIDS compared to female infants .
  • Prematurity and Low Birth Weight: Infants born prematurely or with a low birth weight are at an increased risk of SIDS . This aligns with the need for developmental follow-up for children born preterm .
  • Maternal Factors:
    • Maternal Smoking: Smoking during pregnancy is a significant risk factor for SIDS . Postnatal care guidelines advise parents to avoid smoking around the baby to reduce SIDS risk .
    • Maternal Drug Use: Maternal drug use is also associated with an increased risk of SIDS .
    • Young Maternal Age: Infants born to younger mothers may have a higher risk .
  • Socioeconomic Factors: Lower socioeconomic status is associated with an increased risk of SIDS .
  • Ethnicity: Some studies indicate higher rates of SIDS in certain ethnic groups .

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 .

Educational content only. Always verify information and use clinical judgement.