Integrating Pain-CBT Into an mHealth Analgesic Support Intervention for Patients With Chronic Pain From Advanced Cancers

>70% of subjects complete any activity on the STAMP+CBT application at least 50% of days on study (4-week study period). The app will be considered feasible if this benchmark is achieved.

Defined as completion of the 14- and 28-days surveys, which assesses completion of the pain and medication monitoring reports by participants in the control group.

Acceptability of the intervention is defined as > 80% of the participants rate the application as satisfactory and useful with a mean 4 or higher score out of 5 on the Acceptability E-Scale (Tariman 2011). The Acceptability E-Scale a 7-item measure with answer ranging from 1 "Very Difficulty/Difficult to understand/Not at all/Very unacceptable/Very dissatisfied/Not useful/Very unlikely" to 5 "Very Easy/Easy to understand/Very much/ Very acceptable/Very satisfied/Very useful/Very likely" and with a total scores range of 7 to 35 with a higher score representing greater participant acceptability. Subjects will be assigned surveys at baseline, 4 weeks, and 6 weeks. Participants will rate the app on the following 5 domains: understandability, enjoyability, ease of use, time required to use the app, and overall satisfaction. Ratings lower than 4/5 will lead to refinements.

Acceptability of the intervention is defined as > 80% of the participants rate the application as satisfactory and useful with a mean 4 or higher score out of 5 on the Acceptability E-Scale (Tariman 2011). The Acceptability E-Scale a 7-item measure with answer ranging from 1 "Very Difficulty/Difficult to understand/Not at all/Very unacceptable/Very dissatisfied/Not useful/Very unlikely" to 5 "Very Easy/Easy to understand/Very much/ Very acceptable/Very satisfied/Very useful/Very likely" and with a total scores range of 7 to 35 with a higher score representing greater participant acceptability. Subjects will be assigned surveys at baseline, 4 weeks, and 6 weeks. Participants will rate the app on the following 5 domains: understandability, enjoyability, ease of use, time required to use the app, and overall satisfaction. Ratings lower than 4/5 will lead to refinements.

Defined as the proportion of participants of the intervention group on study for the complete study period. Subjects are defined as individuals who consented and enrolled to the trial and complete study measures and either 28 days of app use (intervention group) or 28 days of education packet review (control group). Rates of completion will be compared between the intervention and control groups.

Defined as the proportion of participants of the control group on study for the complete study period. Subjects are defined as individuals who consented and enrolled to the trial and complete study measures and either 28 days of app use (intervention group) or 28 days of education packet review (control group). Rates of completion will be compared between the intervention and control groups.

Defined as the proportion of participants of the intervention group on study for the complete study period. Subjects are defined as individuals who consented and enrolled to the trial and complete study measures and either 28 days of app use (intervention group) or 28 days of education packet review (control group). Rates of completion will be compared between the intervention and control groups.

Defined as the proportion of participants of the control group on study for the complete study period. Subjects are defined as individuals who consented and enrolled to the trial and complete study measures and either 28 days of app use (intervention group) or 28 days of education packet review (control group). Rates of completion will be compared between the intervention and control groups.

Intervention usability will be assessed by the System Usability Scale (SUS), a 12-item measure rated on a 5-point Likert scale from 1 "Strongly Disagree" to 5 "Strongly Agree" with a total scores range of 0 to 100. A higher score represents greater usability. Subjects will be assigned surveys at baseline, 4 weeks, and 6 weeks. The survey at 4 weeks will assess intervention acceptability with the System Usability Scale (Brooke, 2002). The app will be considered usable if the median score on the System Usability Scale across respondents is >75.

Intervention usability will be assessed by the System Usability Scale (SUS), a 12-item measure rated on a 5-point Likert scale from 1 "Strongly Disagree" to 5 "Strongly Agree" with a total scores range of 0 to 100. A higher score represents greater usability. Subjects will be assigned surveys at baseline, 4 weeks, and 6 weeks. The survey at 4 weeks will assess control education packet acceptability with the System Usability Scale (Brooke, 2002). This information will be used to compare usability scores across intervention and control groups.

Assessed by the BPI, a 7-item subscale on pain interference with answers scored on a scale from 0 "Does not interfere" to 10 "Greatly interferes." A total scores range is 0 to 70 with a higher score indicating greater pain interference.

Assessed by the BPI, a 7-item subscale on pain interference with answers scored on a scale from 0 "Does not interfere" to 10 "Greatly interferes." A total scores range is 0 to 70 with a higher score indicating greater pain interference.

Assessed by the Brief Pain Inventory (BPI) pain intensity subscale, a 4-item measure on pain intensity with answers scored on a scale from 0 "No pain" to 10 "Pain as bad as you can imagine." A total scores range is 0 to 40 with a higher score indicating greater pain intensity.

Assessed by the Brief Pain Inventory (BPI) pain intensity subscale, a 4-item measure on pain intensity with answers scored on a scale from 0 "No pain" to 10 "Pain as bad as you can imagine." A total scores range is 0 to 40 with a higher score indicating greater pain intensity.