[bunderbunder]

FWIW, the data out there is also a bit muddled by inconsistent use of the term "co-sleeping". Pediatricians often use the term to mean having the child in your room, but not necessarily in bed with you. They'll reserve "bedsharing" as the term for the subset of co-sleeping where the infant's in bed with the parents.

That makes it a bit difficult to interpret the existing literature since you can't always be sure exactly what is being measured.

FWIW, when I was reading it seemed like the majority of the benefit comes from having the baby in the same room as you. It's fine to have them sleep in a bassinet so you can have a bit more room to yourselves. Or just if you don't want to spend all night being kicked by a restless newborn.