Systems and methods for screening, diagnosis and monitoring sleep-disordered breathing

Abstract

A method and system are disclosed for use in monitoring/screening/diagnosing sleep or wake state of a subject or patient. The method generally includes monitoring the patient's activity during one or more sleep sessions comprising a plurality of intervals known as epochs. The sleep/wake state of the subject is determined during each epoch of the session using actigraphy data obtained during the monitoring session. The actigraphy data provides information about the activity of a patient during an epoch. The sleep or wake state is determined based on a ratio of the activity count during an epoch to the activity count during a preceding epoch. If the ratio is greater than a first activity threshold, then a 'wake' indication may be provided by, for example, the system. Alternatively, or additionally, a 'wake' indication may be determined if the activity count during the epoch is greater than a threshold.