Table 1. Demographics and distribution of included total hip replacements.
| All total hip replacements | Constructs using a cemented stem | Constructs using the same femoral stem as the exemplar center | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operated on at the exemplar center | Not operated on at the exemplar center | Operated on at the exemplar center | Not operated on at the exemplar center | Operated on at the exemplar center | Not operated on at the exemplar center | ||||||||
| Total, n | 6,230 | 658,531 | 6,228 | 379,691 | 6,227 | 228,814 | |||||||
| Female, n (%) | 3,621 | (58.1) | 402,406 | (61.1) | 3,619 | (58.1) | 245,891 | (64.8) | 3,619 | (58.1) | 146,219 | (63.9) | |
| Mean age, SD | 70.2 | (10.6) | 69.9 | (10.1) | 70.2 | (10.6) | 72.5 | (9.2) | 70.2 | (10.6) | 72.1 | (9.3) | |
| Mean body mass index, kg/m2 (SD) | 28.6 | (5.2) | 28.7 | (5.2) | 28.6 | (5.2) | 28.4 | (5.1) | 28.6 | (5.2) | 28.5 | (5.1) | |
| Posterior approach, n (%) | 5,553 | (89.1) | 377,802 | (57.4) | 5,552 | (89.1) | 208,652 | (55.0) | 5,551 | (89.1) | 136,090 | (59.5) | |
| American Society of Anesthesiologists score, n (%) | I | 963 | (15.5) | 98,212 | (14.9) | 963 | (15.5) | 48,189 | (12.7) | 963 | (15.5) | 29,987 | (13.1) |
| II | 4,499 | (72.2) | 462,006 | (70.2) | 4,497 | (72.2) | 265,746 | (70.0) | 4,496 | (72.2) | 159,682 | (69.8) | |
| III | 756 | (12.1) | 95,507 | (14.5) | 756 | (12.1) | 63,868 | (16.8) | 756 | (12.1) | 38,050 | (16.6) | |
| IV & V | 12 | (0.2) | 2,806 | (0.4) | 12 | (0.2) | 1,888 | (0.5) | 12 | (0.2) | 1,095 | (0.5) | |
| National Health Service funded, n (%) | 6,123 | (98.3) | 552,907 | (84.0) | 6,121 | (98.3) | 317,950 | (83.7) | 6,120 | (98.3) | 193,566 | (84.6) | |
| Consultant as operating surgeon, n (%) | 3,004 | (48.2) | 546,315 | (83.0) | 3,002 | (48.2) | 302,394 | (79.6) | 3,001 | (48.2) | 184,886 | (80.8) | |
| Cemented acetabulum, n (%) | 4,927 | (79.1) | 263,055 | (39.9) | 4,927 | (79.1) | 244,644 | (64.4) | 4,926 | (79.1) | 147,578 | (64.5) | |
Table demonstrating the demographics and distribution of all total hip replacements included in this study broken down by exposure groups and sensitivity analysis subgroups.