Table 3

WOMAC knee pain (yes/no) and synovitis in CE MRI in a subset of subjects

Synovitis
None/questionable (n=146)Some (n=163)A lot/extensive (n=20)p For trend
No radiographic OA (n=329)
 None (n (%))82 (56)74 (45)5 (25)
 Any knee pain (n (%))64 (44)89 (55)15 (75)
 Adj OR for pain (95% CI)*, excluding effusion missing1.01.4 (0.8 to 2.3)5.1 (1.2 to 22.0)0.04
None/questionable (n=6)Some (n=70)A lot/extensive (n=49)
Radiographic OA (n=125)
 None (n (%))2 (33)21 (30)4 (8)
Any knee pain (n (%))4 (67)49 (70)45 (91)
Adj OR for pain (95% CI)*, excluding effusion missing1.02.4 (0.2 to 22.7)6.6 (0.6 to 80.2)0.02
  • * Adjusted for age, sex, BMI and MRI bone marrow lesions and effusions.

  • BMI, body mass index; CE, contrast-enhanced; OA, osteoarthritis; WOMAC, Western Ontario and McMaster Osteoarthritis Index.