Table 4.
Summary of baseline characteristics and follow-up information by procedure type in men undergoing hip arthroplasty, including Birmingham hip resurfacing. Figures are numbers (percentage) unless stated otherwise
| Birmingham hip resurfacing (n=8352) | Uncemented (n=50 529) | Cemented (n=53 409) | |
|---|---|---|---|
| Baseline characteristics | |||
| Age (years): | |||
| Mean (SD) | 55.9 (8.6) | 66.2 (9.9) | 72.3 (8.6) |
| Median | 56.6 | 66.7 | 72.9 |
| Interquartile range | 50.4-61.9 | 60.3-73.1 | 67.2-8.1 |
| Range | 19.0-85.0 | 17.1-98.8 | 18.1-101.7 |
| ASA (American Society of Anesthesiologists) grade: | |||
| 1 | 3999 (47.9) | 10 761 (21.3) | 8246 (15.4) |
| 2 | 4087 (48.9) | 33 594 (66.5) | 35 838 (67.1) |
| 3 | 256 (3.1) | 5918 (11.7) | 8947 (16.8) |
| 4 | 8 (0.1) | 246 (0.5) | 360 (0. 7) |
| 5 | 2 (0.02) | 10 (0.02) | 18 (0.03) |
| Procedure type: | |||
| Primary | 8262 (98.9) | 50 176 (99.3) | 48 743 (91.3) |
| Complex primary | 90 (1.1) | 353 (0.7) | 4666 (8.7) |
| Both sides: | |||
| No | 8297 (99.3) | 50 304 (99.6) | 53 319 (99.8) |
| Yes | 55 (0.7) | 225 (0.5) | 90 (0.2) |
| Follow-up | |||
| Endpoint: | |||
| Death | 93 (1.1) | 1872 (3.7) | 4821 (9.0) |
| Revision | 159 (1.9) | 830 (1.6) | 645 (1.2) |
| Unrevised | 8100 (97.0) | 47 827 (94.7) | 47 943 (89.8) |
| Total length of follow-up, person years | 27 961 | 134 702 | 183 101 |