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.

Lai et al. Chinese Medicine 2007 2:4   doi:10.1186/1749-8546-2-4