Table 1 Feasibility measures and performance guided by the RE-AIM framework recruitment

Recruitment

Goals: ≥ 40 screened/month (50% female, 25% minoritized racial or ethnic populations)

Performance: 617 total screens in 8 months; > 100 screened/month during the 3 months of peak study screening activity; 69% female, 27% from minoritized racial or ethnic populations

Enrollment

Goals: ≥ 8 enrolled/month (50% female, 25% minoritized racial or ethnic populations)

Performance: 35 enrolled in 4-month period (enrolled/month ranged from 7 to 11 during that period; 60% female, 19% from minoritized racial or ethnic populations)

Intervention acceptability, credibility, safety

Goals: ≤ 10% never receive any treatment; ≤ 10% receive prohibited treatments during 12-week intervention phase (contamination); ≥ 80% satisfied with SBSM treatment; no pre-specified safety goals

Performance: 41 of 42 enrolled participants received treatment (98%); 2 of the 42 enrolled participants (5%) sought prohibited treatments outside the study during the 12-week intervention phase (1 SBSM participant had a massage visit, and 1 MC participant visited a chiropractor); 85% satisfied with SBSM treatment

Participant adherence

Goals: ≥ 80% participants attend required sessions (SBSM = 6; MC = 2); ≥ 70% of SBSM participants report participation in home practices; ≥ 70% of MC participants report taking medications as prescribed

Performance: 93% of participants attended required sessions (39/42); 95% of SBSM participants reported engaging in home practices at 3 months (19/20); 77% of MC participants reported taking medications as prescribed (17/22)

Provider fidelity

Targets: Providers deliver 100% of required intervention activities on ≥ 70% of visits

Performance: SBSM providers delivered all required intervention activities on 72% of visits (111/155). All but one of the required activities (encouragement to use daily logs) were performed at 93% of sessions (n = 144/155); MC providers delivered 100% of required intervention activities on 99% of visits (79/80)

Data collection

Targets: ≥ 85% of participants complete 3 month follow up; ≥ 80% of participants complete 6 month follow up; ≥ 80% of weekly pain severity and frequency surveys completed

Performance: 90% of participants completed 3 and 6 month follow up; 86% of weekly pain severity and frequency surveys were completed with 81% of participants completing ≥ 80% or at least 21 of the 26 weekly surveys