Table 1.
Descriptive Characteristics of Study Sample (N = 1709)
| Characteristic | Mean (SD) or % |
|---|---|
| Baseline | |
| % Original cohort | 75.6 |
| Demographic | |
| Mean (SD) Age | 59.5 (9.5) |
| % Women | 63.6 |
| % African American | 27.8 |
| % with < 12 Years Education | 25.9 |
| Health Related | |
| Mean (SD) Body Mass Index (kg/m2) | 29.3 (6.0) |
| Mean (SD) Waist to Hip Ratio | 0.87 (0.09) |
| % Hypertension | 32.9 |
| % Diabetes | 8.7 |
| % High cholesterol | 20.8 |
| OA Related | |
| % Non-steroidal Anti-inflammatory Drug Use | 31.5 |
| % Symptomatic Osteoarthritis | 15.4 |
| Function Related | |
| Mean Health Assessment Questionnaire; HAQ (SD) | 0.27 (0.47) |
| % 0 = HAQ | 58.6 |
| % 0 < HAQ < 1 | 30.8 |
| % 1 ≤ HAQ | 10.6 |
| Mean (SD) Speed During 8 ft. Walk (m/s) | 0.87 (0.26) |
| Mean (SD) Chair Stand Times (s) | 12.2 (4.8) |
| % Q1a | 20.5 |
| % Q2 | 23.1 |
| % Q3 | 23.5 |
| % Q4 | 27.5 |
| % Unable to Complete | 5.4 |
| Follow-up | |
| Mean (SD) years to follow-up | 5.9 (1.2) |
| % Worsened HAQ | 33.0 |
| % Worsened 8 ft. Walk speed | 49.6 |
| % Worsened Chair Stand Time | 42.2 |
| % Incident Cardiovascular Disease | 15.9 |
a5 Chair stand time quartlies defined from the non-exposure subsample without sxKOA at baseline: Males: Q1 (time < =8.4 s), Q2 (8.4 s < time < =10.2 s), Q3 (10.2 s < time < =12.9 s), Q4 (12.9 s < time)"; Females: Q1 (time < =9.0 s), Q2 (9.0 s < time < =11.3 s), Q3 (11.3 s < time < =14.1 s), Q4 (14.1 s < time)
SD standard deviation, OA Osteoarthritis