Figure 1
From: Characterisation of sleep in intensive care using 24-hour polysomnography: anobservational study
Prevalence of eligible patients. Number of patients admitted toICU during the time period in which the study was conducted, eligible for thestudy, enrolled and completing 24-hour polysomnography (PSG) monitoring andsleep questionnaires on the hospital ward. aEnrolment ofeligible patients was limited by the availability of only one PSG and oneresearcher for the entire 24-hour recording period.