Fig. 3From: Evaluation of the add-on NOWAPI® medical device for remote monitoring of compliance to Continuous Positive Airway Pressure and treatment efficacy in obstructive sleep apneaComparison of overnight CPAP treatment duration (minutes)—Respiratory Polygraph vs NOWAPI® (PP data set, n = 20). Crosses represent the 16 patients with a perfect agreement in CPAP treatment duration measurement between NOWAPI® and polygraphy, all crosses being aligned on the 1:1 fit line. The circles represent the four outliers. Detailed NOWAPI® data files of patients #19 and 20 are presented in Fig. 4 Back to article page