Table 1.
Characteristics of study sample
| n= 1318 | |
|---|---|
| Worsening ROA1 | 42% |
| Consistent frequent knee pain2 | 32% |
| Worsening knee pain3 | 37% |
| Comorbidity (≥ 1) | 39% |
| Study Site [Alabama] | 27% |
| Depressive Symptoms [CES-D≥16] | 7% |
| Fatigue | 33% |
| Lives alone | 17% |
| Widespread pain | 39% |
| Catastrophizing | 48% |
| Season of baseline clinic visit | |
| Spring (March 15 to June 14) | 24.6% |
| Summer (June 15 to September 14) | 37.0% |
| Fall (September 15 to December 14) | 22.9% |
| Winter (December 15 to March 14) | 15.4% |
| Calendar days deviated from baseline to two-year follow-up | |
| < 30 days | 70% |
| 31 to 60 days | 21% |
| 61 to 90 days | 4% |
| 91 to 120 days | 2% |
| > 120 days | 3% |
1
Worsening ROA defined as any increase in joint space narrowing or Kellgren and Lawrence grades from baseline to the two-year follow up.
2
Frequent knee pain = Pain at a telephone visit and the baseline clinic visit
3
Worsening knee pain: ≥ 20% increase in WOMAC pain plus absolute increase of >=2/20 from baseline to the two-year follow-up