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CPAP adherence for 6 months in the CPAP-only and CPAP + motivational enhancement (ME) arms. Each data point represents the mean adherence for each 7-day period. Each line is a fitted LOESS (local regression) curve, with the shaded area representing the 95% CI for the curve. Timing of the face-to-face ME visits are marked as “F”; timing of the phone-based ME visits are marked as “P.”
