Variable | Primary cases (n=194) | All comparators (n=406) |
Age, years | 62.04±8.80 | 61.31±8.92 |
Female, number (%) | 110 (56.70) | 243 (59.85) |
BMI, kg/m2 | 30.73±4.77 | 30.71±4.79 |
Race, white, % | 155 (79.90) | 320 (78.82) |
K/L grade 1/2/3, number (%) | 24/84/86 (12.37/43.30/44.33) | 51/222/133 (12.56/54.68/32.76) |
WOMAC pain score | 10.15±12.98 | 13.00±16.66 |
Pain medication use, number (%) | 63 (32.47) | 114 (28.08) |
Minimum medial radiographic JSW, mm | 3.79±1.39 | 3.85±1.06 |
Mean (IPFP) | 0.19±0.04 | 0.19±0.04 |
sDev (IPFP) | 0.09±0.02 | 0.09±0.02 |
Mean (H) | 0.36±0.06 | 0.36±0.06 |
sDev (H) | 0.09±0.01 | 0.09±0.02 |
Median (H) | 0.35±0.06 | 0.34±0.06 |
UQ (H) | 0.41±0.06 | 0.40±0.07 |
Percentage (H) | 0.13±0.01 | 0.13±0.01 |
Clustering factor (H) | 0.74±0.05 | 0.73±0.05 |
*Values are the mean±SD except for numbers and percentages. Primary cases were knees in group 1, namely the knees with both radiographic and pain progression. All comparators consisted of group 2 (knees with radiographic progression but not pain progression), group 3 (knees with pain progression but not radiographic progression) and group 4 (knees with neither radiographic progression nor pain progression).
BMI, body mass index; JSW, joint space width; K/L, Kellgren/Lawrence; OA, osteoarthritis; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.