Table 1 Characteristics of participants with radiographic-confirmed knee osteoarthritis by race (N = 2583)
Characteristic | African Americans | Caucasian Americans |
|---|---|---|
|  | (n = 508) | (n = 2075) |
| Â | percentage | |
Age (years): ≥ 65 | 30.5 | 46.4 |
Women | 70.9 | 55.0 |
Education | Â | Â |
 ≤ High school | 31.0 | 15.3 |
 ≥ Some college | 69.0 | 84.7 |
Income ($) | Â | Â |
 ≤ 50,000 | 66.5 | 36.9 |
 50,000–100,000 | 25.9 | 38.2 |
 >100,000 | 7.6 | 24.8 |
Married/partnered | 37.2 | 72.7 |
Insurance covers prescriptions | 84.6 | 87.5 |
Kellgren-Lawrence Grade | Â | Â |
 2 | 33.5 | 31.5 |
 3 | 49.4 | 47.2 |
 4 | 17.1 | 21.3 |
Symptom-related multi-joint osteoarthritis | 68.5 | 68.9 |
History of knee injury or surgery | 46.9 | 56.3 |
Obesity | 66.1 | 38.5 |
| Â | mean (standard deviation) | |
KOOS Pain | 61.6 (23.0) | 78.3 (18.1) |
KOOS Symptoms | 63.7 (21.6) | 78.6 (17.6) |
KOOS Quality of Life | 51.2 (23.4) | 65.5 (22.1) |
KOOS Function in Daily Life | 67.9 (22.3) | 84.8 (16.2) |
KOOS Function in Sports and Recreational Activities | 52.8 (24.3) | 69.9 (21.5) |
SF-12 Mental Health Score | 52.1 (10.1) | 54.3 (7.6) |
SF-12 Physical Health Score | 42.3 (10.8) | 48.9 (8.7) |