Notwithstanding rapidly accumulating evidence from
perhaps 100 studies showing associations of long sleep with
mortality and morbidity, discussion of similar studies has
typically focused on the mortality and morbidity risks of
short sleep while dismissing the association with long sleep
as some sort of artifact For example, it has been argued
that the opposite direction of putative causality (morbidity
causing long sleep) is likely to explain the associations of
long sleep with mortality and morbidity. Contrary to this
argument are findings that the associations of long sleep
with mortality and morbidity are just as apparent after
controlling for multiple morbidities