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Sudden infant death syndrome is associated with parental psychiatric admission

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Dr Roger T Webb

Correspondence to: Dr Roger T Webb, Centre for Women’s Mental Health Research, University of Manchester, Williamson Building, Oxford Road, Manchester M13 9PL, UK;



Is sudden infant death syndrome (SIDS) associated with parental psychiatric admission?


All Danish infants born between January 1973 and December 1998, identified through the Civil Registration System (n = 1 439 982).


Denmark; January 1973 to December 1998.

Risk factors:

First parental inpatient admission (after age 16 years) for an ICD-10 psychiatric diagnosis or alcohol- or drug-related disorder occurring before their infant’s first birthday or death (identified through the Psychiatric Central Register from April 1969 onwards). Time dependent stratification was used to categorise exposure by person-years of risk following first admission. Results were adjusted according to whether the mother, father or both parents had been admitted.


SIDS and other natural or unnatural causes of death, identified through the national Causes of Death Register using ICD-8 classifications.



Retrospective cohort study (register-based).

Follow up period:

From birth to first birthday, …

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  • Competing interests: None.

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