The Lullaby Trust SIDS statistics infographic published September 2021

Sudden infant death syndrome (SIDS) is the sudden and unexplained death of an infant where no cause is found after detailed post mortem.

  • 170 unexplained infant deaths occurred in England and Wales in 2019, a rate of 0.27 deaths per 1,000 live births: a decrease from 0.32 deaths per 1,000 live births in 2018
  • Just over half (55.3%) of all unexplained infant deaths were boys in 2019 (0.29 deaths per 1,000 live births). This is a decrease from 57.6% in 2018
  • In 2019, the unexplained infant mortality rate was highest for mothers aged under 20 years, at 0.96 deaths per 1,000 live births
  • 196 unexplained infant deaths occurred in the entire UK in 2019, a rate of 0.28 deaths per 1,000 live births

Credit: Office of National Statistics, National Records of Scotland and Northern Ireland Statistics and Research Agency 2020

For SIDS information by region click here >>