Half of cot deaths are linked to bed-sharing but many parents are sceptical about the risk, studies have concluded.

通过研究得出结论，一半的摇篮病与跟父母同床有关，但是很多父母对此表示怀疑。

A quarter of 500 mothers polled by the UK's Foundation for the Study of Infant Deaths (FSID) doubted that sharing a bed with a baby put them at undue¹ risk（不合理的风险）.

But a Bristol University team's study published online in the British Medical Journal found that sharing a bed is a factor in more than 50% of cases.

Many of the deaths occurred when parent and infant slept together on a sofa.

Much of this risk was linked to parents' smoking and alcohol or use of sedating²（安静的，镇静的） drugs before bedtime.

A fifth of the cot death infants were found with a pillow and a quarter were swaddled（束缚）, which may be new risk factors, say the authors.

Although cot death rates in the UK has fallen dramatically since the "Back to Sleep" campaign in the early 1990s, specific advice is still needed to help reduce these deaths even further, say the Bristol University researchers.

"Parents need to be advised never to put themselves in a situation where they might fall asleep with a young infant on a sofa."

And they should never sleep with an infant in any environment if they have consumed alcohol or drugs, the team warned.

But they said some parents might still want to share a bed with their baby, particularly if they needed to feed their infants many times in the night, and that this practice should not be demonised.

It could lead to increased numbers of tired parents nodding off（打盹） on their sofa with their baby, they warned.

FSID's director, Joyce Epstein, said the findings were alarming.

"We know that those at greatest risk of experiencing a cot death are very young mums, often single, and still in their teens, and this group is the most likely to reject safe sleep advice."

The charity has launched a social networking website, www.bubbalicious.co.uk, aimed at supporting teenage parents.

The FSID poll findings are published in Community Practitioner³.