a Adjusted1 parameter estimates for the 3 socioeconomic variables singly
associated with HAQ and WOMAC health outcomes scores. |
Variable |
HAQ2 (Range 0-3) |
WOMAC2 Function (Range
0-68) |
WOMAC Pain (Range 0-20) |
WOMAC Total (Range 0-96) |
Educational
attainment, <12 yrs
|
0.25** [0.09, 0.41] |
4.5* [0.48, 8.51] |
0.90 [-0.32, 2.12] |
5.66* [0.2, 11.1] |
Occupation,
NM4
|
0.10 [-0.06, 0.27] |
5.12* [1.05, 9.19] |
1.72** [0.48, 2.96] |
7.40** [1.87, 12.9] |
Poverty
Rate, Medium (12-25%)
|
0.06 [-0.12, 0.24] |
1.38 [-3.19, 5.96] |
0.08 [-1.31, 1.47] |
1.66 [-4.56, 7.88] |
Poverty
Rate, High (≥25%) |
0.06 [-0.21, 0.32] |
-0.12 [-6.71, 6.48] |
0.31 [-1.69, 2.32] |
0.29 [-8.67, 9.26] |
b Adjusted1
parameter estimates for all 3 socioeconomic variables simultaneously
associated with HAQ and WOMAC health outcomes scores |
Educational
attainment, <12 yrs
|
0.24** [0.07, 0.41] |
3.17 [-1.10, 7.44] |
0.33 [-0.97, 1.63] |
3.56 [-2.24, 9.37] |
Occupation,
NM4
|
0.02 [-0.16, 0.19] |
4.02 [-0.32, 8.37] |
1.61* [0.28, 2.95] |
6.16* [0.23, 12.1] |
Poverty
Rate, Medium (12-25%)
|
0.05 [-0.13, 0.24] |
1.48 [-3.04, 6.00] |
0.09 [-1.29, 1.46] |
1.73 [-4.41, 7.87] |
Poverty
Rate, High (≥25%) |
0.04 [-0.22, 0.30] |
0.10 [-6.45, 6.64] |
0.42 [-1.57, 2.41] |
0.57 [-8.31, 9.45] |
** p <0.01
* p<0.05.
1 All models are adjusted for age, gender, BMI, race, knee symptoms, comorbidity, occupational physical activity score.
2 HAQ= Health Assessment Questionnaire, n=251, WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index, n=244.
3 Values are the β [95% confidence interval].
4 NM = non-managerial, physically demanding.