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 MSt MRCGP.

Posted: 17 August 2025Updated: 17 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed

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.

Sids That I Should Be Aware: Risk Factors: Guideline-aligned Answer |