Table 2.
Patient characteristics, medical history, and operation-related data according to fixation method
| Patient characteristics and operative data | Cemented (n = 3811), number (%) or median (range) | Cementless (n = 464), number (%) or median (range) | Hybrid (n = 502), number (%) or median (range) | p value |
|---|---|---|---|---|
| Average age (years) | 82 (80–102) | 82 (80–93) | 82 (80–95) | 0.464 |
| Sex | 0.135 | |||
| Male | 1064 (27.9) | 150 (32.3) | 145 (28.9) | |
| Female | 2747 (72.1) | 314 (67.7) | 357 (71.1) | |
| Comorbid diseases | ||||
| Hypertension | 2145 (56.3) | 263 (56.7) | 284 (56.6) | 0.981 |
| Cardiovascular disease | 1286 (33.7) | 174 (37.5) | 168 (33.5) | 0.260 |
| Diabetes | 327 (8.6) | 43 (9.3) | 43 (8.6) | 0.882 |
| Cancer | 343 (9.0) | 49 (10.6) | 48 (9.6) | 0.526 |
| Pulmonary disease | 383 (10.0) | 52 (11.2) | 61 (11.2) | 0.289 |
| Depression | 300 (7.9) | 27 (5.8) | 34 (6.8) | 0.224 |
| Psychotic disorder | 89 (2.3) | 10 (2.1) | 7 (1.4) | 0.403 |
| Dementia | 81 (2.1) | 13 (2.8) | 12 (2.4) | 0.623 |
| Any of the above | 2856 (74.9) | 357 (76.9) | 117 (76.7) | 0.482 |
| Previous joint replacements (contralateral hip and/or either knee) | 1336 (35.1) | 168 (36.2) | 170 (33.9) | 0.747 |
| Previous replacement of contralateral hip | 1025 (26.9) | 133 (28.7) | 123 (24.5) | 0.335 |
| Operating hospital | < 0.001 | |||
| University hospital | 1071 (28.1) | 82 (17.7) | 98 (19.5) | |
| Central hospital | 1304 (34.2) | 221 (47.6) | 240 (47.8) | |
| District hospital | 822 (21.6) | 32 (6.9) | 77 (15.3) | |
| Other (including private hospitals) | 614 (16.1) | 129 (27.8) | 87 (17.3) | |
| Same-day bilateral hip replacement | 16 (0.4) | 8 (1.7) | 1 (0.2) | 0.004 |
| Intravenous antibiotic prophylaxis (data missing for 56 operations) | 3695 (97.0) | 441 (95.0) | 485 (96.6) | 0.012 |
| Duration of perioperative hospitalization (days)* | 13 (0–4728) | 13 (0–2997) | 14 (0–2908) | 0.008 |
| Proportion of patients still hospitalized 90 days after surgery | 122 (3.2) | 19 (4.1) | 19 (3.8) | 0.509 |
* In 103 patients the length of perioperative hospitalization exceeded 1 year. Most of these patients probably are waiting for a place in a long-term care facility or are institutionalized at healthcare center wards.