Helen S. Driver, Farzad Saberi, Neela Chatha, Alison M. Urton, Peter Munt and Michael F. Fitzpatrick Abstract Objectives: To examine the reliability of a diagnosis of positional obstructive sleep apnea (OSA), with an apnea hypopnea index (AHI) for lateral sleep less than half the supine AHI (S-AHI) and less than 15 per hour, in patients using positional therapy for a full … [Read more...] about How Reliable is the Diagnosis of Positional Obstructive Sleep Apnea? – Helen S. Driver, Farzad Saberi, Neela Chatha, Alison M. Urton, Peter Munt and Michael F. Fitzpatrick