Here is the Bed Sharing portion from the American Academy of Pediatrics - the whole document is great I think but it's a .pdf and I'm not sure if I can attach it in this thread. If anyone knows how, let me know. Otherwise, I'd be happy to email it to anyone who would like to see it!
Sorry for the funny format and footer references...copying text from a .pdf
BED SHARING
Bed sharing between an infant and adult(s) is a
highly controversial topic. Although electrophysiologic
and behavioral studies offer a strong case for
its effect in facilitating breastfeeding and the enhancement
of maternal-infant bonding,35,36 epidemiologic
studies of bed sharing have shown that it can
be hazardous under certain conditions. Several case
series of accidental suffocation or death from undetermined
cause suggest that bed sharing is hazardous.
34,37–39 A number of case-control studies of SIDS
deaths have investigated the relationship of SIDS
with parent(s) and/or other adults or children sleep-
ing with an infant.16,31,40–48 Some of these studies
have found the correlation between death and bed
sharing to reach statistical significance only among
mothers who smoked.41,47 However, the European
Concerted Action on SIDS study,42 which was a large
multisite study, found that bed sharing with mothers
who did not smoke was a significant risk factor
among infants up to 8 weeks of age. Similarly, a more
recent study conducted in Scotland48 found that the
risk of bed sharing was greatest for infants younger
than 11 weeks, and this association remained among
infants with nonsmoking mothers. The risk of SIDS
seems to be particularly high when there are multiple
bed sharers31 and also may be increased when
the bed sharer has consumed alcohol or is overtired.
42,47 Also, the risk of SIDS is higher when bed
sharing occurs with young infants.40–42 It is extremely
hazardous when adults sleep with an infant
on a couch.31,40,41,48 Finally, the risk of bed sharing is
higher the longer the duration of bed sharing during
the night.41,47 Returning the infant to his or her crib
was not associated with an increased risk in 2 studies,
40,41 and in another, the risk was significant only
when the bed sharing occurred for more than 1 hour
or for the whole night.16 There is growing evidence
that room sharing (infant sleeping in the parent’s
room) without bed sharing is associated with a reduced
risk of SIDS.41,42,43,48 Data from the European
Concerted Action on SIDS42 study led to the recommendation
by its authors that the most protective
sleep setting for an infant is in a crib in the parents’
room. On the basis of their study results, investigators
in Scotland48 endorsed the United Kingdom Department
of Health’s advice that the safest place for
an infant to sleep is in a crib in the parents’ room for
the first 6 months of life.