A new study suggests that regularity of bedtime prior to initiation of continuous positive airway pressure (CPAP) therapy is an important factor that may influence treatment compliance in adults with obstructive sleep apnea (OSA). Results show that bedtime variability was a significant predictor of CPAP adherence.  The odds of one-month CPAP non-adherence were 3.7 times greater for every one unit increase in habitual, or pre-treatment, bedtime variability. The results were published in the SLEEP 2013 abstract supplement and will be presented Wednesday, June 5, at SLEEP 2013 in Baltimore, Md.