GRADE summary of findings table
| Outcome | Follow-up (years) | Trainee revision/ cases,* n | Consultant revisions/ cases,* n | Net survival/relative risk (95% CI) | Participants (studies), n | Quality of evidence | Comments |
| THR: net implant survival | 5 | 650 | 1045 | NS: Trainee 97.9% (96.6% to 99.2%) NS: Consultant 98.1% (97.1% to 99.2%) | 1695 (3)26–28 | Very low | Serious ROB, indirectness and imprecision |
| 10 | 348 | 734 | NS: Trainee 98.1% (95.9% to 99.1%) NS: Consultant 96.7% (94.7% to 97.9%) | 1082 (1)27 | Low | Serious indirectness and imprecision | |
| THR: crude revision rate | 5 | 13/919 | 29/1794 | RR: 0.88 (0.46 to 1.70) | 2713 (3)12 26 27 | Very low | Serious ROB, indirectness, and imprecision |
| 10 | 13/634 | 40/1318 | RR: 0.68 (0.37 to 1.26) | 1952 (2)13 27 | Low | Serious indirectness and imprecision | |
| TKR: net implant survival | 5 | 236 | 450 | NS: Trainee 97.9% (95.0% to 99.2%) NS: Consultant 95.4% (93.0% to 97.0%) | 686 (1)15 | Low | Serious imprecision |
| 10 | 386 | 550 | NS: Trainee 96.2% (94.0% to 98.4%) NS: Consultant 95.1% (93.0% to 97.2%) | 936 (2)15 29 | Very low | Serious inconsistency and imprecision | |
| 15 | 150 | 100 | NS: Trainee 91.0% (85.0% to 97.0%) NS: Consultant 92.0% (90.0% to 94.0%) | 250 (1)29 | Very low | Serious inconsistency and very serious imprecision | |
| TKR: crude revision rate | 5 | 5/236 | 20/450 | RR: 0.47 (0.18 to 1.25) | 686 (1)15 | Low | Serious imprecision |
| 10 | 8/236 | 26/450 | RR: 0.58 (0.27 to 1.27) | 686 (1)15 | Low | Serious imprecision | |
| 15 | 4/150 | 4/100 | RR: 0.67 (0.17 to 2.60) | 250 (1)29 | Very low | Serious inconsistency and very serious imprecision | |
| UKR: net implant survival | 10 | 673 | 411 | NS: Trainee 93.0% (90.3% to 95.7%) NS: Consultant 93.9% (90.2% to 97.6%) | 1084 (1)16 | Low | Serious imprecision |
| UKR: crude revision rate | 5 | 1/118 | 4/155 | RR: 0.33 (0.04 to 2.90) | 273 (1)30 | Low | Serious imprecision |
| 10 | 31/673 | 15/411 | RR: 1.26 (0.69 to 2.31) | 1084 (1)16 | Low | Serious imprecision |
*Number of revisions not reported for net implant survival.
GRADE, Grading of Recommendations Assessment, Development and Evaluation; NS, net survival; ROB, risk of bias; RR, relative risk; THR, total hip replacement; TKR, total knee replacement; UKR, unicompartmental knee replacement.