Descriptive statistics for elective admissions for primary hip replacements with complete data (n=2352)
| Variable | N (%) | Proportion (%) admitted >7 days | Mean length of stay (SD) n=2331 | Proportion (%) exceeding medically fit for discharge date |
| Age at admission | ||||
| 0–34 | 60 (2.6) | 15.9 | 3.8 (2.3) | 10.32 |
| 35–44 | 93 (4.0) | 6.5 | 4.1 (3.0) | 5.4 |
| 45–54 | 233 (9.9) | 6.0 | 4.0 (2.4) (n=232) | 4.3 |
| 55–64 | 440 (18.7) | 8.6 | 4.3 (3.0) (n=437) | 5.9 |
| 65–74 | 723 (30.7) | 14.7 | 5.1 (4.2) (n=718) | 9.5 |
| 75–84 | 650 (27.6) | 27.2 | 6.6 (4.7) (n=644) | 13.7 |
| 85+ | 153 (6.5) | 51.6 | 9.6 (5.9) (n=148) | 39.9 |
| Age at admission, mean (SD) | 67.5 (13.6) | – | – | – |
| Sex | ||||
| Female | 1387 (59.0) | 20.1 | 5.1 (3.9) (n=1367) | 14.0 |
| Male | 965 (41.0) | 15.0 | 4.7 (3.8) (n=956) | 7.2 |
| Deprivation (IMD score) | ||||
| 1 (Least deprived) | 679 (28.9) | 17.5 | 5.4 (4.1) (n=674) | 9.6 |
| 2 | 551 (23.4) | 14.7 | 5.0 (4.1) (n=547) | 7.4 |
| 3 | 409 (17.4) | 17.6 | 5.4 (3.8) (n=406) | 11.0 |
| 4 | 381 (16.2) | 22.8 | 6.1 (5.0) (n=377) | 16.3 |
| 5 (Most deprived) | 332 (14.1) | 19.6 | 5.6 (4.6) (n=327) | 15.1 |
| Ethnicity | ||||
| Non-white | 37 (2.5) | – | – | – |
| Asian | 8 (0.6) | – | – | – |
| Black | 15 (1.0) | – | – | – |
| Mixed | 7 (0.5) | – | – | – |
| Other | 7 (0.5) | – | – | – |
| White | 1417 (97.5) | – | – | – |
| Unknown | 898 | – | – | – |
| Comorbidities (weighted Charlson index) | ||||
| 0 | 1298 (55.2) | 11.7 | 4.7 (3.6) (n=1290) | 8.3 |
| 1–2 | 857 (36.4) | 22.8 | 6.1 (4.6) (n=849) | 13.3 |
| 3–4 | 170 (7.2) | 37.7 | 7.6 (5.3) (n=166) | 20.5 |
| ≥5 | 27 (1.2) | 48.2 | 8.8 (6.0) (n=26) | 25.9 |
| Time since last discharge | ||||
| 0–2 months | 341 (14.5) | 31.1 | 6.9 (5.4) (n=335) | 20.8 |
| 2–12 months | 528 (22.5) | 21.4 | 5.7 (4.5) (n=518) | 12.3 |
| 12 months or more | 354 (15.1) | 13.0 | 5.0 (3.7) | 10.5 |
| Never | 1129 (48.0) | 14.1 | 5.0 (3.9) (n=1124) | 8.0 |