Table 2 Recruitment and retention in trials with adequate flow diagrams
All trials Median (IQR) | THA trials Median (IQR) | TKA trials Median (IQR) | |
|---|---|---|---|
Recruitment (randomised:screened) | 73% (44–91%) | 68% (44–94%) | 74% (43–90%) |
Retention (analysed:randomised) | 97% (93–100%) | 98% (95–100%) | 97% (92–100%) |
Trials with < 95% retention | 33% | 25% | 35% |