Table 1.
Demographics and baseline characteristics of patients with OA or RA and of asymptomatic organ donorsa
| Patient demographics | OA (n = 45) | RA (n = 22) | Donors (n = 20) |
|---|---|---|---|
| Mean age, yr (±SD) | 53 ± 9 | 54 ± 11 | 52 ± 7 |
| Sex, M/F | 6/39 | 5/17 | 5/15 |
| WOMAC score | 95 to 1,828 | NA | NA |
| ESR, mm/hour | NA | 10 elevated, 12 normal | NA |
| X-ray (K-L grade) | 2-4 | NA | NA |
| RF, IU | NA | All positive | NA |
| SF, WBC/μL | <2,000 | 7,000 to 25,000 | <2,000 |
aOA, osteoarthritis; RA, rheumatoid arthritis; Donors, asymptomatic organ donor; ESR, erythrocyte sedimentation rate; WOMAC, Western Ontario and McMaster Universities (WOMAC) index; K-L grade, Kellgren-Lawrence grade; RF, rheumatoid factor; IU, international units; SF WBC, synovial fluid white blood cell count; NA, not applicable. The ages of patients and donors are mean age at study entry ± SD.