Quick Data on Sudden Syndrome of Infant Death

In the United States, there are around 3,500 sudden accidental child deaths (SUID) each year. In infants less than 1 year of age, these deaths occur and have no immediately apparent cause.

The three forms of SUID widely recorded include the following:

Syndrome of sudden child death (SIDS).
Unidentified trigger.
Accidental suffocation and in-bed strangulation.
There were approximately 1,300 deaths from SIDS in 2018 , approximately 1,300 deaths from unexplained causes, and about 800 deaths from accidental suffocation and strangulation in bed.

SIDS according to geography

California had the lowest SUID rate (49.5 per 100,000 live births) among the 50 states and the District of Columbia (D.C.), and Alabama had the highest SUID rate (178.3 per 100,000 live births), more than 3.5 times the lowest rate.
The highest SUID levels were in Alabama , Arkansas, Mississippi, Alaska, and Louisiana.
The lowest SUID levels were in California, Massachusetts, New York, Vermont, and Colorado.
There are 28 states (91.2 per 100,000 live births) with rates above the US average.

Beginning in 1990, the SUID incidence, which involves sudden infant death syndrome (SIDS), unknown cause, and accidental bed suffocation and strangulation (ASSB), declined dramatically. This decline came after the release of
Recommendations for healthy sleep from the American Academy of Pediatrics in 1992.
The launch of the 1994 movement for Back to Sleep (now known as Healthy to Sleep ® external icon).
The release of the Sudden Unexplained Reporting Form for Infant Death Investigation in 1996.
Declines have eased since 1999. The SUID rate in 2018 was 90.9 fatalities per 100,000 live births.
SUID has been listed less frequently as SIDS in recent years, and more often as ASSB or unknown cause.
SIDS rates decreased dramatically from 130.3 deaths in 1990 per 100,000 live births to 35.2 deaths in 2018 per 100,000 live births.
The unexplained cause of infant mortality remained the same from 1990 until 1998, when infant mortality rates started to rise. The unexplained cause of child mortality in 2018 was 33.7 deaths per 100,000 live births.
Until the late 1990s, ASSB mortality rates remained unchanged. Beginning in 1997, rates began to rise. The number was 22.1 fatalities per 100,000 live births in 2018.
In accordance with the International Classification of Diseases, Ninth Revision (ICD-9) for 1984-1998 and the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10) for 1999-2015, codes of cause of death were established. The following underlying cause of death (ICD-9 and ICD-10) codes were used to identify the cause of death: ASSB (E913.0; W75), SIDS (798.0; R95), and unknown cause (799.9; R99). The SUID rate was a mixture of ASSB, SIDS, and deaths from unexplained causes.