Table 1.
Characteristics of the patients
| Pre-surgery | Six-months follow-up | Two-years follow-up | |
|---|---|---|---|
| N | 298 | 176 | 111 |
| Age*, years | |||
| Mean (SD) | 66.8(7.6) | 66.9(7.8) | 66.3(7.9) |
| Female, n (%) | 226(80.4) | 137(79.7) | 84(77.8) |
| Ethnicity, n (%)† | |||
| Chinese | 257(92.1) | 156(91.2) | 97(89.8) |
| Others | 22(7.9) | 15(8.7) | 11(10.19) |
| Right knee, n (%) | 161(54.0) | 99(56.3) | 64(57.7) |
| Years with OA, mean(SD) | 7.8(3.8) | 7.7(3.5) | 7.7(3.8) |
| BMI (kg/m2), mean(SD) | 27.9(4.3) | 28.1(4.2) | 28.2(4.1) |
| < 25, n (%) | 101(34.5) | 57(32.8) | 33(30.3) |
| 25-29.9, n (%) | 116(39.6) | 72(41.4) | 45(41.3) |
| > 30, n (%) | 76(25.9) | 45(25.9) | 31(28.4) |
TKR=total knee replacement; SD=standard deviation; OA=osteoarthritis;
BMI=body mass index; OKS=Oxford Knee Score.
*Ages were based on pre-surgery values.
†Other ethnicity included Malay, Indian and others.