Table 2.
Baseline Characteristics of the Black and White Participants in the Knee Pain Trial
| Black (n=285) |
White (n=785) |
p value |
Black (n=285) |
White (n=785) |
p value |
|||
|---|---|---|---|---|---|---|---|---|
| Age, mean (SD) | 63.0(6.3) | 68.3(6.3) | <0.001 | Depression, (%) | 29.1 | 26.2 | 0.35 | |
| Female, (%) | 77.5 | 60.9 | <0.001 | Diabetes, (%) | 29.3 | 17.9 | <.001 | |
| Geographic Location, (%) | <0.001 | Hypertension, (%) | 83.0 | 64.9 | <.001 | |||
| Northeast | 20 | 22 | Smoking, (%) | 48.0 | 46.7 | 0.70 | ||
| Midwest | 22.1 | 25.6 | Acetaminophen, (%) | 51.4 | 50.4 | 0.78 | ||
| West | 7.4 | 20.1 | NSAID, (%) | 73.7 | 77.3 | 0.25 | ||
| South | 50.5 | 32.2 | Stronger pain medication, (%) | 43.3 | 24.0 | <0.001 | ||
| Education, (%) | <0.001 | Body Mass Index, (%) | <0.001 | |||||
| ≤High school | 32.0 | 12.3 | < 30 (kg/m2) | 31.6 | 50.1 | |||
| >High school | 68.0 | 87.7 | ≥30 (kg/m2) | 68.4 | 49.9 | |||
| Income, (%) | <0.001 | WOMAC pain, mean (SD) | 44.8(20.5) | 32.4(16.0) | <0.001 | |||
| <50,000 | 64.2 | 34.8 | 44.9(20.9) | 32.2(17.8) | <0.001 | |||
| ≥50,000 | 27.7 | 54.5 | WOMAC function, mean (SD) | |||||
| Baseline TKR | 57 (20.0) | 155 (19.8) | 0.93 | Physical Activity, ≥ 2 met hours/week, (%) | 69.8 | 76.4 | 0.03 | |
SD; standard deviation, NSAID; non steroidal anti-inflammatory drugs, WOMAC; Western Ontario and McMaster’s 0–100 (100 worse), Stronger pain medication; morphine, propoxyphene, codeine, oxycodone, hydrocodone, tramadol, butalbital/acetaminophen/caffeine, amitryptiline, gabapentin.