| Non-THA (n=37) | THA (n=6) | |
| Years (mean ± SD) | 58.7±7.1 | 64.7±8.2* |
| Stage: number(%) 1 (pre-arthritis stage) | 2(5.4%) | 0(0%) |
| 2 (early stage) | 4(10.8%) | 0(3%) |
| 3 (advanced stage) | 8(21.6%) | 1(16.7%) |
| 4 (end stage) | 21(56.8%) | 5(83.3%) |
| Affected side: number(%) (Unilateral/ Bilateral) | 11/25(29.7%/67.6%) | 2/4(33.3%/66.7%) |
| Time from diagnosis: number ≤1y | 0(0%) | 0(0%) |
| 1~3y | 1(2.7%) | 1(16.7%) |
| 3~5y | 0(0%) | 0(0%) |
| 5~10y | 4(10.8%) | 1(16.7%) |
| ≥10y | 32(86.5%) | 4(66.7%) |
| Continuing rehabilitation in the hospital: number (yes/ no)(%) | 8/29(21.6%/78.4%) | 5/1** (83.3%/16.7%) |