MOBILE application engagement may predict clinically meaningful pain reduction for adults with chronic pain and hazardous drinking. What This Pilot Study EvaluatedEvidence based psychological care for chronic pain can be difficult to access in primary care. Researchers therefore examined whether Mobile health (mHealth) engagement behaviors within an eight-week program were linked to later pain outcomes in adults with chronic pain who also engaged in hazardous drinking. In contrast, the frequency of instant messaging coaching sessions did not appear to be linked with pain outcomes in this sample. Mobile App Engagement and Pain Outcomes Among Primary Care Chronic Pain Patients Who Engage in Hazardous Drinking: A Pilot Study.