Additional file 1 of Participant and trial characteristics reported in predictive analyses of trial attrition: an umbrella review of systematic reviews of randomised controlled trials across multiple conditions

Additional file 1. Tables and figures providing additional information for the methods and results of this umbrella review. Supplementary Table 1. PRISMA checklist. Supplementary Table 2. Eligibility criteria. Supplementary Table 3. Search strategy used for each database. Supplementary Table 4. R-AMSTAR checklist. Supplementary Table 5. Additional review characteristics describing attrition outcomes and definitions. Supplementary Table 6. Additional review characteristics describing the evaluation of participant characteristics. Supplementary Table 7. Additional review characteristics describing the evaluation of trial characteristics. Supplementary Table 8. Summary of conditions studied by included reviews. Supplementary Table 9. Summary of quality appraisal using R-AMSTAR. Supplementary Fig. 1. Frequency of R-AMSTAR total and domain scores. Supplementary Table 10. Summary of participant characteristics evaluated by included reviews. Supplementary Table 11. Summary of participant characteristics evaluated among conditions studied. Supplementary Table 12. Summary of trial characteristics evaluated by included reviews. Supplementary Table 13. Summary of trial characteristics evaluated among conditions studied