Fig. 1From: Is the 2013 American Thoracic Society CPAP-tracking system algorithm useful for managing non-adherence in long-term CPAP-treated patients?The study flow chart. Patients in the InterfaceVent study (NCT03013283) meeting 2013 ATS algorithm criteria and lacking interface or data availability problems were included in the final analysis. The four subgroups correspond to different device-mask combinations and their associated thresholds* as foreseen in the ATS criteriaBack to article page