Strategy | Sample | Goal | Data collection | Analysis |
---|---|---|---|---|
Process metrics | All patients referred for TB diagnostic evaluation at intervention sites | Examine variability in adoption of and fidelity to intervention components across sites | Entire post-randomization period | Multivariate regression models |
Surveys | 1) Health workers involved in TB evaluation at all sites* 2) Sixty patients per site (20 patients/site, 400 total pre-randomization; 40 patients/site, 800 total post-randomization)** | Examine whether the XPEL TB strategy modifies targeted barriers to TB diagnostic evaluation | Once before and once after trial is completed | Multivariate regression models |
Focus groups | Health workers involved in TB evaluation at intervention sites* | Assess acceptability of each component of the intervention strategy. | After trial is completed | Thematic interpretation |
In-depth interviews | Purposive: 20–30 health workers at high- and low-performing intervention strategy sites (2–3/site) | Understand reasons for variability in adoption and implementation of the XPEL TB strategy | After trial is completed | Thematic interpretation |