Table 3.
Cumulative percent second revision of known primary THA by reason for the first revision (primary diagnosis of osteoarthritis)
| Revision diagnosis | 1 year CPR (95% CI) | 2 years CPR (95% CI) | 3 years CPR (95% CI) | 4 years CPR (95% CI) | 5 years CPR (95% CI) | 6 years CPR (95% CI) | 7 years CPR (95% CI) |
| Loosening | 7 (7-8) | 10 (9-11) | 12 (11-13) | 13 (12-15) | 14 (13-15) | 15 (14-17) | 17 (15-18) |
| Fracture | 8 (7-9) | 10 (9-11) | 11 (10-12) | 11 (10-13) | 12 (11-13) | 13 (11-14) | 13 (12-15) |
| Prosthesis dislocation or instability | 10 (9-11) | 13 (12-14) | 15 (14-16) | 17 (16-18) | 18 (17-20) | 20 (18-21) | 20 (19-22) |
| Osteolysis | 7 (5-10) | 9 (7-13) | 11 (8-15) | 11 (8-16) | 11 (8-16) | 13 (10-18) | 14 (10-19) |
| Revision diagnosis | 8 years CPR (95% CI) | 9 years CPR (95% CI) | 10 years CPR (95% CI) | 11 years CPR (95% CI) | 12 years CPR (95% CI) | 13 years CPR (95% CI) |
| Loosening | 17 (16-19) | 18 (17-20) | 19 (18-21) | 20 (18-22) | 21 (19-22) | 21 (19-23) |
| Fracture | 15 (13-16) | 15 (14-17) | 16 (14-18) | 18 (15-20) | 18 (16-21) | 19 (16-22) |
| Prosthesis dislocation or instability | 21 (20-23) | 23 (21-24) | 24 (23-27) | 26 (24-29) | 28 (25-30) | 29 (27-32) |
| Osteolysis | 14 (10-19) | 14 (10-19) | 14 (10-19) |
| Revision diagnosis | 14 years CPR (95% CI) | 15 years CPR (95% CI) | 16 years CPR (95% CI) | 17 years CPR (95% CI) | 18 years CPR (95% CI) | 19 years CPR (95% CI) | 20 years CPR (95% CI) |
| Loosening | 22 (20-25) | 22 (20-25) | 24 (21-28) | 25 (21-30) | |||
| Fracture | 20 (17-23) | 21 (17-25) | |||||
| Prosthesis dislocation or instability | 30 (27-32) | 31 (28-33) | 31 (28-33) | 31 (28-35) | |||
| Osteolysis |
This excludes revisions where no minor or major femoral or acetabular components were inserted.