Table II.
Comparison of index arthroplasty procedure data of patients among revision time groups
| Variable | The duration between primary hip arthroplasty and revision surgery | Total (N = 396) | P-value | |||
|---|---|---|---|---|---|---|
| < 2 years (very early) (n = 120) | 2–5 years (early) (n = 94) | 5–10 years (inter-mediate) (n = 98) | > 10 years (late) (n = 84) | |||
| Index acetabular component fixation: | < 0.001* | |||||
| Cemented | 4 (3%) | 10 (11%) | 16 (16%) | 20 (24%) | 50 (13%) | |
| Cementless | 84 (70%) | 54 (57%) | 60 (61%) | 47 (56%) | 245 (62%) | |
| None (hemiarthroplasty) | 32 (27%) | 30 (32%) | 22 (23%) | 17 (20%) | 101 (25%) | |
| Index femoral component fixation: | < 0.001* | |||||
| Cemented | 34 (28%) | 43 (46%) | 44 (45%) | 57 (68%) | 178 (45%) | |
| Cementless | 86 (72%) | 51 (54%) | 54 (55%) | 27 (32%) | 218 (55%) | |
| Index femoral component design: | 0.593* | |||||
| Conical | 65 (54%) | 46 (49%) | 63 (64%) | 51 (61%) | 225 (57%) | |
| Cylindrical | 48 (40%) | 46 (49%) | 33 (34%) | 33 (39%) | 160 (40%) | |
| Rectangular | 2 (2%) | 0 (0%) | 0 (0%) | 0 (0%) | 2 (1%) | |
| Resurface | 5 (4%) | 2 (2%) | 2 (2%) | 0 (0%) | 7 (2%) | |
| Index femoral head size [mm]: | 0.063* | |||||
| 28 | 29 (24%) | 10 (10%) | 28 (29%) | 19 (23%) | 86 (22%) | |
| 32 | 45 (37%) | 45 (48%) | 45 (46%) | 35 (42%) | 170 (43%) | |
| 36 | 14 (12%) | 9 (10%) | 3 (3%) | 13 (15%) | 39 (10%) | |
| Other (hemiarthroplasty) | 32 (27%) | 30 (32%) | 22 (22%) | 17 (20%) | 101 (25%) | |
| Index bearing surface: | 0.864* | |||||
| Metal on polyethylene | 78 (65%) | 54 (57%) | 68 (69%) | 59 (71%) | 259 (65%) | |
| Metal on metal | 9 (7%) | 9 (10%) | 8 (8%) | 7 (8%) | 28 (8%) | |
| Ceramic on ceramic | 1 (1%) | 1 (1%) | 0 (0%) | 1 (1%) | 3 (1%) | |
| None (hemiarthroplasty): | 32 (27%) | 30 (32%) | 22 (23%) | 17 (20%) | 101 (25%) | |
| Index surgical approach: | 0.039* | |||||
| Posterolateral | 75 (62%) | 58 (62%) | 74 (76%) | 47 (56%) | 254 (64%) | |
| Lateral | 9 (8%) | 12 (13%) | 3 (3%) | 6 (7%) | 30 (8%) | |
| Anterolateral | 36 (30%) | 24 (25%) | 21 (21%) | 31 (37%) | 112 (28%) | |
*
P-value according to Pearson’s χ2 test, Bold p-values indicate statistically significance.