Table 3.
Results of the generalized estimating equation model without and with adjustment of demographic characteristics*
| Outcome | Unadjusted | Adjusted | ||
|---|---|---|---|---|
| Six-month | Two-year | Six-month | Two-year | |
| SF-36 | ||||
| Physical functioning | 22.5 (1.65) < 0.0001 |
26.7 (2.09) < 0.0001 |
22.8 (1.95) < 0.0001 |
27.3 (2.51) < 0.0001 |
| Role physical | 32.9 (3.37) < 0.0001 |
28.7 (4.45) < 0.0001 |
35.9 (4.00) < 0.0001 |
26.8 (5.40) < 0.0001 |
| Bodily pain | 6.04 (1.46) 0.0003 |
-0.57 (1.56) 0.7100 |
4.48 (1.72) 0.0093 |
-1.41 (1.96) 0.4715 |
| General health | 0.12 (0.81) 0.8800 |
-4.13 (0.90) < 0.0001 |
0.34 (1.01) 0.7336 |
-4.23 (1.16) 0.0003 |
| Role emotional | 15.6 (2.60) < 0.0001 |
12.2 (3.20) 0.0001 |
15.9 (3.37) < 0.0001 |
12.9 (3.96) 0.0011 |
| Social functioning | 1.54 (1.28) 0.2310 |
-1.52 (1.22) 0.2120 |
0.81 (1.76) 0.6466 |
-2.52 (1.72) 0.1431 |
| Vitality | -0.202 (1.21) 0.8670 |
-0.584 (1.33) 0.0600 |
-1.08 (1.53) 0.4819 |
0.15 (1.74) 0.9294 |
| Mental health | 1.18 (0.93) 0.2050 |
0.57 (0.95) 0.5510 |
2.04 (1.09) 0.0613 |
-0.07 (1.28) 0.9569 |
| OKS | 28.5 (1.22) < 0.0001 |
33.4 (22.6) < 0.0001 |
28.8 (1.56) < 0.0001 |
32.4 (1.74) < 0.0001 |
| KSS | ||||
| Knee | 37.5 (1.32) < 0.0001 |
41.3 (1.55) < 0.0001 |
37.0 (1.68) < 0.0001 |
40.4 (2.12) < 0.0001 |
| Functioning | 16.2 (1.52) < 0.0001 |
20.9 (1.90) < 0.0001 |
15.8 (1.79) < 0.0001 |
19.4 (2.27) < 0.0001 |
OKS: Oxford Knee Score; KSS: Knee Society Clinical Rating Scale.
*Numbers are the mean change from pre-surgery with standard error in parenthesis and p value.