SIDS Risk Age, Prevention & Safe Sleep Guidelines

Sudden Infant Death Syndrome (SIDS) is the unexplained death of an infant <1 year, usually during sleep. Peak incidence: 2–4 months; 90% occur by 6 months.

Triple-Risk Model

SIDS requires convergence of:

1. Vulnerable infant: Underlying brainstem abnormality (arousal, autonomic control)
2. Critical developmental period: 2–4 months (rapid physiological changes)
3. Exogenous stressors: Prone sleep, soft bedding, overheating, smoke exposure

Evidence-Based Prevention (AAP Safe Sleep)

• Back to sleep: Every sleep, every nap, until 1 year
• Firm, flat, non-inclined surface: Crib/bassinet/play yard meeting CPSC standards
• Room-sharing without bed-sharing: Infant in parents' room, separate surface, ideally 6–12 months
• Bare crib: No pillows, blankets, bumpers, stuffed animals, positioners
• Breastfeeding: Any duration protective; exclusive 6 months ideal
• Pacifier at sleep onset: After breastfeeding established
• Avoid smoke/alcohol/drugs: Prenatal and postnatal
• Avoid overheating: Light clothing, comfortable room temp
• Prenatal care & immunization: Both reduce SIDS risk
• Tummy time (awake): Strengthens neck/shoulders

What Doesn't Prevent SIDS

Home cardiorespiratory monitors, wedges, special mattresses, "breathable" bumpers—no evidence; some increase risk.

SIDS rates dropped >50% since "Back to Sleep" (1994). Continued adherence saves lives.