Table 3.
Median pre-operative, post-operative and change in OKS by age, sex and K-L score for TKR cohort (n = 536) and the radiographic sub-cohort (n = 91).
| Variables | N | Median (IQR) Pre-operative OKS |
Post-operative OKS | Change in OKS | |
|---|---|---|---|---|---|
| K-L grade | 0–1 | 9 | 22.0 (10.0–27.0) | 20.0 (12.0–24.0) | −2.0 (−3.0–2.0) |
| 2 | 19 | 15.0 (13.1–22.0) | 22.0 (16.0–40.0) | 4.0 (−4.0–26.0) | |
| 3–4 | 62 | 13.0 (8.0–17.0) | 37.0 (21.0–42.0) | 26.0 (3.0–29.0) | |
| Age | <60 | 79 | 16.0 (12.0–21.0) | 27.0 (18.0–37.0) | 11.0 (2.0–19.0) |
| 60–69 | 166 | 17.0 (13.0–22.0) | 35.0 (23.0–41.0) | 15.5 (7.0–23.0) | |
| ≥70 | 291 | 17.0 (12.0–22.0) | 34.0 (27.3–40.0) | 16.0 (10.0–23.0) | |
| Sex | Female | 321 | 16.0 (11.0–20.0) | 34.0 (25.0–40.0) | 17.0 (8.0–24.0) |
| Male | 215 | 18.0 (14.0–23.0) | 34.0 (24.0–41.0) | 14.3 (7.0–20.0) | |
| Total n536 | 536 | 16.4 (12.0–22.0) | 34.0 (24.0–40.8) | 15.0 (8.0–22.0) |