Matt T Bianchi1, Yvonne Alameddine2, James Mojica3. 1. Neurology Department, Massachusetts General Hospital, Boston, USA; Division of Sleep Medicine, Harvard Medical School, Boston, MA, USA. Electronic address: mtbianchi@partners.org. 2. Neurology Department, Massachusetts General Hospital, Boston, USA. 3. Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA, USA.
Abstract
BACKGROUND: Modern continuous positive airway pressure (PAP) machines track hours of use and residual respiratory events while on treatment. A substantial portion of sleep apnea patients are partially compliant, emphasizing the need to distinguish between PAP efficacy and PAP effectiveness in chronic management of patients with sleep apnea. METHODS: We used a combination of three data sources to estimate the sleep apnea burden in a convenience cohort of PAP users from our clinics that were compliant based on Medicare criteria: self-reported habitual total sleep time, and PAP usage times with residual apnea-hypopnea index (AHI) from compliance downloads. RESULTS: Assuming that the off-PAP time consists of baseline AHI severity, an estimated apnea burden was calculated to estimate PAP effectiveness. Whereas 70% of patients in our cohort showed machine AHI values <5/h, the apnea burden calculations revealed that only one-third of patients are predicted to have an effective AHI <5. CONCLUSION: Estimating PAP effectiveness through the concept of apnea burden has implications for clinical care as well as research trials.
BACKGROUND: Modern continuous positive airway pressure (PAP) machines track hours of use and residual respiratory events while on treatment. A substantial portion of sleep apneapatients are partially compliant, emphasizing the need to distinguish between PAP efficacy and PAP effectiveness in chronic management of patients with sleep apnea. METHODS: We used a combination of three data sources to estimate the sleep apnea burden in a convenience cohort of PAP users from our clinics that were compliant based on Medicare criteria: self-reported habitual total sleep time, and PAP usage times with residual apnea-hypopnea index (AHI) from compliance downloads. RESULTS: Assuming that the off-PAP time consists of baseline AHI severity, an estimated apnea burden was calculated to estimate PAP effectiveness. Whereas 70% of patients in our cohort showed machine AHI values <5/h, the apnea burden calculations revealed that only one-third of patients are predicted to have an effective AHI <5. CONCLUSION: Estimating PAP effectiveness through the concept of apnea burden has implications for clinical care as well as research trials.
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