[Working time and sleep in nursing staff employed in "3 x 8" and "2 x 12" fast rotating shift schedules]. / Orari di lavoro e sonno nel personale infermieristico impiegato in sistemi di turnazione rapida "3 x 8" e "2 x 12".

The study is aimed at assessing, in 200 nurses shift workers, the impact on sleep of two different working areas ("emergency" and "hospitalization") having the same "3 x 8" shift system, and of two different shift schedules at quick rotation ("2 x 12" and "3 x 8") in the same working area ("emergency"). Night and morning shifts prove to interfere to a greater extent with sleep in relation to both "2 x 12" and "3 x 8" shift systems as well as to the two operative areas. Hence the importance to consider in shift work planning, the direction of shift rotation and the length of the duty period according to the type of activity.