Ethics Approval
pain
This study was reviewed for human subject protection and approved (#Pro00035440) by institutional review boards at the universities of South Florida, Michigan, and Washington, respectively. All participants consented prior to study participation, including participants who fell to attrition during the onboarding processes. Participants were compensated with reimbursement for their time. Each participant who provided weekly MR reports on usage and pain ratings for the first 8 weeks received weekly payments of US $5 for a total of US $40. To incentivize study completion, each participant who provided assessment data across each of the 4 time points in a 4-month period received US $20 for a total of US $80. Each telephone interview participant received an additional US $20. The total possible incentive for study participants was up to US $140. All study work was completed in adherence to oversight regulations and the approved published protocol [