A Randomized Controlled Study Assessing the Role of an Ambulatory Approach Versus the Conventional Approach in Managing Suspected Obstructive Sleep Apnoea Syndrome

We conducted a prospective, randomized, controlled continuous positive airway pressure (CPAP) parallel study on new referrals to the Respiratory Clinic, Prince of Wales Hospital, with suspected obstructive sleep apnea (OSAS). OSAS was defined by apnea-hypopnea index(AHI) 5/hr or more of sleep plus excessive daytime sleepiness or two of the following symptoms: choking or gasping during sleep, recurrent awakenings from sleep, unrefreshed sleep, daytime fatigue, and impaired concentration. All patients with suspected OSAS underwent assessment at the clinic with the Epworth sleepiness score(ESS) and symptoms evaluation. Patients who had ESS score>9 or at least two OSAS symptoms as described above were invited to join the study. They were randomized into either group A)home-based management approach or group B)hospital-based management approach by a random table by a third party not involved in the trial.