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Infants should sleep in their own beds to reduce the risk of sudden infant death syndrome


The advice given to reduce the risk of sudden infant death syndrome, SIDS, has worked well, but the potential to save more lives exists. In addition to sleeping on their backs, infants should sleep in their own beds for the first few months to reduce the risk of sudden infant death. A new doctoral thesis at Sahlgrenska Academy at University of Gothenburg has explored these issues.

In the early 1990s, the Swedish National Board of Health and Welfare went out with advice to new parents to reduce the number of children who die each year from SIDS. The advice stated that children sleep safest on their backs, that smoking during pregnancy is a risk factor, that children should not be kept too warm, that they should be able to move freely and that breastfeeding provided a certain amount of protection.

Per Möllborg

Source: University of Gothenburg

Fewer deaths
The preventative advice led to a sharp drop in the number of deaths from SIDS; from over a hundred children annually, to about twenty deaths per year in more recent years.

Risk and preventative factors have changed when the cases are fewer and have not been studied recently. In a new thesis at Sahlgrenska Academy, the University of Gothenburg, Per Möllborg, Child Health Medical Officer, has studied the different factors surrounding SIDS to enable further preventative work.

"Infants should sleep in their own beds"
“The results show that more lives could potentially be saved if fewer babies slept on their stomachs or were placed on their sides, if fewer mothers smoked during pregnancy and if infants slept in their own beds in their parents’ bedroom during the first three months,” says Per Möllborg.

Children sleeping with their parents can be a risky situation during the first months. One of the thesis’ four studies examined co-sleeping. One out of five children slept with their parents at 6 months of age and it was even more common if the child was breastfed, had difficulty sleeping and woke often as well as if the mother was a single parent. If the child used a pacifier, co-sleeping was less common.

Current advice
The thesis shows that current advice is relatively well followed, and that only one in 20 infants are laid down to sleep on their stomachs. Babies were more commonly sleeping on their stomachs if the mother was unemployed, smoked during pregnancy, if the child was irritable, shared a room with siblings or did not use a pacifier.

“This knowledge gives the Child Health Centers the opportunity to more precisely focus information and further reduce the number of babies placed on their stomachs,” says Per Möllborg.

Lowered average age
One of the studies in the thesis showed that the risk of SIDS was greater if the parents did not live together, if the mother was young, had given birth to many children or if the baby was premature.

As sudden infant death syndrome has become less common, smoking has become a greater risk factor. Now, it is no longer more common for deaths during the winter months and the average age of sudden infant death has lowered from just under 3 months to 2 months, since introduction of the new advice in the early 1990s.

Link to thesis:

Per Möllborg, Director and Child Health Medical Officer at Närhälsan, Region Fyrbodal, and PhD Candidate at Sahlgrenska Academy, University of Gothenburg. E-mail:

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