A system configured to classify a breathing disorder of a subject, the system comprising: a pressure generator configured to provide a pressurized flow of breathable gas at a pressure level to an airway of a subject; one or more sensors configured to generate output signals conveying information related to breathing of the subject; and a therapy component configured to obtain a recommended respiratory therapy regimen for the subject that includes a recommended inspiratory positive airway pressure (IPAP) level and a recommended expiratory positive airway pressure (EPAP) level; a timing component configured to determine one or more timing parameters related to the breathing of the subject based on generated output signals; one or more physical processors configured to control the pressurized flow in accordance with the recommended respiratory therapy regimen such that the pressure level of the pressurized flow corresponds to the recommended IPAP level during inspirations and the pressure level of the pressurized flow corresponds to the recommended EPAP level during expirations, wherein control is based on the one or more timing parameters; characterized in that the one or more physical processors are further configured to reduce the pressure level of the pressurized flow with respect to the recommended IPAP level during inspiration for one or more breathing cycles, wherein the reduced pressure level during inspiration is lower than the recommended and/or actually provided expiratory pressure level; and that the system further comprises a breathing parameter component configured to determine one or more breathing parameters of the subject based on the generated output signals during the one or more breathing cycles; and a classification component configured to determine a classification of a breathing disorder of the subject based on the determined one or more breathing parameters during the one or more breathing cycles for which the inspiratory pressure level is reduced. a pressure generator configured to provide a pressurized flow of breathable gas at a pressure level to an airway of a subject; one or more sensors configured to generate output signals conveying information related to breathing of the subject; and a therapy component configured to obtain a recommended respiratory therapy regimen for the subject that includes a recommended inspiratory positive airway pressure (IPAP) level and a recommended expiratory positive airway pressure (EPAP) level; a timing component configured to determine one or more timing parameters related to the breathing of the subject based on generated output signals; one or more physical processors configured to control the pressurized flow in accordance with the recommended respiratory therapy regimen such that the pressure level of the pressurized flow corresponds to the recommended IPAP level during inspirations and the pressure level of the pressurized flow corresponds to the recommended EPAP level during expirations, wherein control is based on the one or more timing parameters; characterized in that the one or more physical processors are further configured to reduce the pressure level of the pressurized flow with respect to the recommended IPAP level during inspiration for one or more breathing cycles, wherein the reduced pressure level during inspiration is lower than the recommended and/or actually provided expiratory pressure level; and that the system further comprises a breathing parameter component configured to determine one or more breathing parameters of the subject based on the generated output signals during the one or more breathing cycles; and a classification component configured to determine a classification of a breathing disorder of the subject based on the determined one or more breathing parameters during the one or more breathing cycles for which the inspiratory pressure level is reduced.