About 10-20% of SUDIs are found on autopsy to have a clear cause of death, for example infection or child abuse. However, as the quality of death scene investigations has improved and autopsy protocols have become more standardized, attention has been focused on unsafe sleeping practices that are contributing to SUDIs. Included in this are deaths attributable to suffocation, another subcategory of SUDI.

Bed sharing, loose bedding, soft sleep surfaces and sleeping on sofas or adult beds have all been implicated in SUDIs due to suffocation. This has led to a new understanding of SIDS and SUDI:

  • The supine sleep position, by itself, is not protective when other unsafe factors are present.
  • Too many babies are dying in unsafe sleep environments.
  • Evidence suggests that many of these deaths are preventable.


This collective data has led both the AAP and the Michigan Department of Community Health to urge health care professionals to go beyond "Back to Sleep" and to focus on the entire infant sleep environment in an effort to further reduce both the SIDS and SUDI rates.



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