Table 2.
Baseline characteristics of participants
| Variable | Value (n = 600) |
|---|---|
| Age, mean (s.d.), years | 61.55 (8.88) |
| Female, n (%) | 353 (58.83) |
| BMI, mean (s.d.), kg/m2 | 30.72 (4.78) |
| Race, White, n (%) | 475 (79.17) |
| K/L grade 1/2/3, n (%) | 75 (12.50)/306 (51.00)/219 (36.50) |
| WOMAC pain score, mean (s.d.) | 12.08 (15.61) |
| Pain medication use, n (%) | 177 (29.50) |
| Minimum medial radiographic JSW, mean (s.d.), mm | 3.83 (1.18) |
| Mean (IPFP), mean (s.d.) | 0.19 (0.04) |
| sDev (IPFP), mean (s.d.) | 0.09 (0.02) |
| Median (H), mean (s.d.) | 0.34 (0.06) |
| UQ (H), mean (s.d.) | 0.40 (0.07) |
| Percentage (H), mean (s.d.) | 0.13 (0.01) |
| Clustering factor (H), mean (s.d.) | 0.73 (0.05) |
IPFP: infrapatellar fat pad; JSW: joint space width; KL: Kellgren–Lawrence; Mean (IPFP): mean value of the whole IPFP signal intensity; Median (H): median value of high signal intensity; Percentage (H): ratio of volume of high signal intensity to volume of whole IPFP signal intensity; sDev (IPFP): standard deviation of the whole IPFP signal intensity; UQ (H): upper quartile value of high signal intensity; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.