Table 2.
Modifiable health factor odds ratios for physical inactivity in adults with radiographic knee OA (n=1089)
| Modifiable Health Factors | N | Percent Inactive | Unadjusted Odds Ratio (95% CI) | Odds Ratio Adjusted for Descriptive Factors# (95% CI) | Odds Ratio Adjusted for Descriptive Factors and Other Modifiable Factors## (95% CI) |
|---|---|---|---|---|---|
| Health Behaviors | |||||
| Fat Intake | |||||
| Adequate/Low | 585 | 47.4 | Reference | Reference | Reference |
| High | 504 | 50.6 | 1.1 (0.9, 1.4) | 1.3 (0.9, 1.6) | 1.0 (0.8, 1.3) |
|
| |||||
| Dietary Fiber Intake | |||||
| Adequate | 227 | 40.5 | Reference | Reference | Reference |
| Inadequate | 862 | 51.0 | 1.5 (1.1, 2.1) | 1.6 (1.2, 2.2) | 1.5 (1.1, 2.1) |
|
| |||||
| Smoker | |||||
| No | 1027 | 48.7 | Reference | Reference | Reference |
| Yes/Missing | 62 | 51.6 | 1.1 (0.7, 1.9) | 1.4 (0.8, 2.5) | 1.4 (0.8, 2.5) |
|
| |||||
| General Health Factors | |||||
| Weight status Normal† | 229 | 35.8 | Reference | Reference | Reference |
| Overweight†† | 441 | 44.0 | 1.4 (1.0, 2.0) | 1.8 (1.2, 2.5) | 1.8 (1.2, 2.5) |
| Obese††† | 419 | 61.1 | 2.8 (2.0, 3.9) | 3.9 (2.6, 5.7) | 3.7 (2.5, 5.4) |
|
| |||||
| Depressive symptoms | |||||
| Not high | 964 | 48.2 | Reference | Reference | Reference |
| High | 125 | 53.6 | 1.2 (0.9, 1.8) | 1.2 (0.8, 1.8) | 1.0 (0.7, 1.6) |
|
| |||||
| Knee Specific Factors | |||||
| WOMAC function‡ | |||||
| No dysfunction | 337 | 42.1 | Reference | Reference | Reference |
| Moderate (middle tertile) | 378 | 46.0 | 1.2 (0.9, 1.6) | 1.3 (0.9, 1.8) | 1.1 (0.7, 1.7) |
| Severe (top tertile) | 374 | 57.8 | 1.9 (1.4, 2.5) | 1.9 (1.3, 2.8) | 1.7 (0.9, 3.1) |
|
| |||||
| WOMAC knee pain‡‡ | |||||
| No pain | 342 | 43.3 | Reference | Reference | Reference |
| Moderate (middle tertile) | 364 | 47.5 | 1.2 (0.9, 1.6) | 1.4 (0.9, 1.9) | 1.3 (0.8, 2.0) |
| Severe (top tertile) | 383 | 55.1 | 1.6 (1.2, 2.2) | 1.7 (1.1, 2.5) | 1.1 (0.6, 2.0) |
|
| |||||
| Knee Confidence | |||||
| Not troubled | 510 | 48.8 | Reference | Reference | Reference |
| Mildly/Moderately troubled | 530 | 47.6 | 1.0 (0.7, 1.2) | 1.0 (0.7, 1.3) | 0.8 (0.6, 1.1) |
| Severely/extremely troubled | 49 | 63.3 | 1.8 (1.0, 3.3) | 1.8 (0.9, 3.6) | 1.4 (0.6, 2.9) |
#
Adjusted for descriptive factors (age, gender, race, living status, education, employment, chronic knee pain, total knee replacement, comorbidities) with associated 95% confidence interval.
##
Adjusted for all descriptive and other modifiable factors with associated 95% confidence interval.
†
Normal includes 1 person with BMI below the range 18.5–24.9;
††
Overweight BMI 25.0–29.9;
†††
Obese BM ≥ 30;
‡
WOMAC function tertiles based on maximum of left and right knees: no dysfunction 0.0, moderate >.0–11.2; severe >11.2;
‡‡
WOMAC pain tertiles based on maximum of left and right knees: none 0.0, moderate >0–3.9; severe>3.9.