Table 2.
Adjusted1 Parameter Estimates for Each of the 3 Socioeconomic Status Variables (Education, Occupation, or Poverty Rate) Singly and Simultaneously Associated with HAQ and WOMAC Health Outcomes2 Scores in Persons with Radiographic Hip OA3
| a. Adjusted1 parameter estimates for the 3 socioeconomic variables singly associated with HAQ and WOMAC health outcomes scores. | ||||
|---|---|---|---|---|
| Variable | HAQ2 (Range 0-3) | WOMAC 2 Function (Range 0-68) | WOMAC Pain (Range 0-20) | WOMAC Total (Range 0-96) |
| Educational attainment, <12 yrs | 0.14**[0.05, 0.24] | 4.07** [1.76, 6.37] | 0.90* [0.22, 1.58] | 5.19** [2.05, 8.34] |
| Occupation, NM4 | 0.03 [-0.06, 0.11] | 3.13** [0.95, 5.31] | 0.98** [0.34, 1.63] | 4.15** [1.17, 7.13] |
| Poverty Rate, Medium (12-25%) | 0.09 [0, 0.19] | 2.41 [-0.04, 4.86] | 0.53 [-0.2, 1.25] | 3.24 [-0.09, 6.57] |
| Poverty Rate, High (≥25%) | 0.15* [0.01, 0.29] | 2.15 [-1.33, 5.63] | 0.65 [-0.38, 1.68] | 3.01 [-1.73, 7.75] |
| b Adjusted1 parameter estimates for all 3 socioeconomic variables simultaneously associated with HAQ and WOMAC health outcomes scores | ||||
| Educational attainment, <12 yrs | 0.15** [0.05, 0.35] | 3.22* [0.73, 5.7] | 0.57 [-0.16, 1.3] | 4.01* [0.63, 7.4] |
| Occupation, NM4 | -0.03 [-0.12, 0.07] | 2.01 [-0.33, 4.34] | 0.78* [0.09, 1.47] | 2.72 [-0.47, 5.91] |
| Poverty Rate, Medium (12-25%) | 0.09 [-0.01, 0.19] | 2.31 [-0.12, 4.74] | 0.49 [-0.23, 1.21] | 3.09 [-0.21, 6.4] |
| Poverty Rate, High (≥25%) | 0.13 [-0.01, 0.27] | 1.80 [-1.66, 5.26] | 0.58 [-0.44, 1.61] | 2.56 [-2.16, 7.28] |
**
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=708, WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index, n=688.
3
Values are the β [95% confidence interval].
4
NM = non-managerial, physically demanding.