Table 4.
The estimates of regression coefficients and standard errors for modeling outcomes of VAS for pain and WOMAC subscales
| WOMAC subscalesb | ||||||||
| Variable definition | VAS for paina | |||||||
| Pain | Stiffness | Physical function | ||||||
| Coeff. | S.E. | Coeff. | S.E. | Coeff. | S.E. | Coeff. | S.E. | |
| Severity at baseline | -0.40*** | 0.08 | -0.42*** | 0.07 | -0.51*** | 0.07 | -0.34*** | 0.07 |
| Mean score improvement at week 2 vs. week 1 | -6.16*** | 1.84 | -4.62** | 1.55 | -8.52*** | 2.11 | -4.24** | 1.34 |
| Mean score improvement at week 4 vs. week 1 | -5.13*** | 1.84 | -5.28*** | 1.55 | -7.22*** | 2.11 | -4.04** | 1.34 |
| Age | 0.00 | 0.24 | 0.21 | 0.20 | 0.33 | 0.23 | 0.39* | 0.18 |
| Gender (female vs. male) | -15.74 | 19.73 | 3.83 | 16.67 | 2.18 | 19.38 | 13.26 | 15.06 |
| Body Mass Index (<25 vs. >= 25) | -0.68 | 3.44 | -1.03 | 2.92 | -1.25 | 3.44 | -1.19 | 2.65 |
| Rescue drug (used vs. not used) | 6.03 | 3.38 | 4.27 | 2.85 | 3.79 | 3.65 | 4.86 | 2.52 |
| Aversion to cold (mild vs. moderate or severe)c | 3.86 | 3.94 | 7.59 | 3.31 | 8.12* | 3.88 | 3.93 | 3.09 |
| Flaccidity of lower back/knee (mild vs. moderate or severe) c | 3.03 | 3.46 | 2.03 | 2.87 | -1.36 | 3.34 | 0.65 | 2.63 |
aVAS = visual analogue scale as the dependent variables.
bRefers to the three subscales of the Western Ontario and McMaster Universities Osteoarthritis (WOMAC) Index as the dependent variables.
cPattern identification as the independent variables.
*indicates P < 0.05; ** indicates P < 0.01; and *** indicates P < 0.001.