Table 1.

mPCST-Community Intervention and Mobile Application

Intervention Component	Sessions
	Session 1	Session 2	Session 3	Session 4
Videoconference Session	• Introduction; study overview • Review participant’s cancer history • Gate Control Theory of Pain • Progressive muscle relaxation (PMR) • Set home practice	• Review home practice • Activity-rest cycle • Fun activity scheduling • Mini-relaxation • Set home practice	• Review home practice • Positive thinking • Calming self-statements • Set home practice	• Review home practice • Imagery • Goal setting • Coping skill review problem-solving for continued practice • Wrap-up and goodbye
Mobile Application Features For Each Session	• Video explanation of Gate Control Theory of Pain • Video demonstration of PMR and audio of full and brief versions of PMR • Audio of patients describing experience with PMR • Participant can share video and/or photograph of where they intend to practice PMR via mobile application; therapist will offer feedback and problem-solving as necessary	• Video explanation of activity-rest cycle • Video of actors engaging in pleasant activities • Audio of mini-relaxation • Participant can share video and/or photograph of where they intend to practice activity-rest cycle, fun activities, and mini-relaxation via mobile application; therapist will offer feedback and problem-solving as necessary	• Video demonstration of positive thinking • Video demonstration of calming self-statements • Reminder of calming self-statement from session • Participant can share video and/or photograph of positive thinking practice and calming self-statements via mobile application; therapist will offer feedback and problem-solving as necessary	• Audio of imagery • Video explanation of goal setting • Reminder of goal discussed during session • Participant can share video and/or photograph of where they intend to practice imagery via mobile application; therapist will offer feedback and problem-solving as necessary • Video to wrap-up study and offer congratulations
Mobile Application Features Across All Sessions	• PDFs of session handouts • Audio summaries of each session and “Session Tips” review • “Caring Messages” with general encouragement and advice (e.g. “Have you practiced your coping skills today?”) • Brief assessments on Monday, Wednesday, and Saturday of daily pain, fatigue, and stress ratings • “Tailored Texts” on Monday, Wednesday, and Saturday based on responses to brief assessments (e.g., “Try PMR or another relaxation practice!”) • Mobile application homescreen will display a “To Do List” with skills for practice, caring messages, tailored texts, as well as reminders to complete brief assessments and full assessments (baseline, post-intervention, 3-month follow-up, 6-month follow-up) • Virtual pet or meter to track skills practice, completion of assigned home practice, brief and full assessments etc.