Fig. 1From: The prevention of delirium in elderly with obstructive sleep apnea (PODESA) study: protocol for a multi-centre prospective randomized, controlled trialFlow chart of study. ESS: Epworth Sleepiness Scale; OSA: obstructive sleep apnea; APAP: auto-titrating continuous positive airway pressure; AHI: apnea-hypopnea indexBack to article page