Table 2

Association of summed synovitis scores from 11 sites and Kellgren–Lawrence grade of the knee radiograph*

Kellgren–Lawrence grade, N (%)
Whole knee synovitis category (summed score)Knees, N (%)01234
Normal/equivocal* (0–4)264 (66)182 (69)44 (17)21 (8)16 (6)1 (0)
Mild* (5–8)76 (19)44 (58)15 (20)9 (12)7 (9)1 (1)
Moderate* (9–12)38 (10)15 (40)6 (16)6 (16)8 (21)3 (8)
Severe* (≥13)22 (6)5 (23)4 (18)4 (18)6 (27)3 (14)
  • * p Value from the mean score test <0.0001, indicating that the more severe the synovitis, the more likely the knees have higher Kellgren–Lawrence grades.