Blair et al. (BMJ Open, 2014): Avon Longitudinal Study
No increased SIDS risk when bed-sharing conditions are met
UK longitudinal data: in non-smoking, sober, breastfeeding parents with a healthy full-term baby on a regular bed, bed-sharing showed no increased SIDS risk vs separate sleeping. Risk emerged with smoking, alcohol, soft bedding, or sofa-sleeping.
Peter Blair and colleagues used data from the Avon longitudinal study, one of the largest UK birth cohorts, to examine SIDS risk in bed-sharing infants under different conditions. The headline finding: in non-smoking parents who had not consumed alcohol or sedating drugs, bed-sharing with a healthy full-term breastfed infant on a regular bed showed no increased SIDS risk compared with separate sleeping.
The risk emerged specifically when smoking, alcohol, soft bedding, or sofa-sleeping entered the picture. The paper appeared in BMJ Open in 2014. The work has been important in shifting the public health conversation from "bed-sharing is dangerous" to "bed-sharing under specific conditions is the problem." Blair's group has continued to publish updates that consistently support the conditional safety framing.
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Increased risk when conditions met
2014
BMJ Open publication
Avon
UK longitudinal cohort
Conditional
Risk profile
Why it matters
The strongest UK-cohort data shows the SIDS risk from bed-sharing is not inherent to the practice. It is associated with specific overlapping risks that can be identified and avoided.
This is one finding from the research library behind How to Birth a Mother. Everything here traces back to a study, a dataset, or a systematic review.