Table 2

The median (interquartile range) number of distal and proximal interphalangeal joints of the dominant hand with MRI pathology and MRI sum scores for the eight joints

Number of jointsSum scores
Osteophytes (0–48)8 (7–8)16 (11–22)
Joint space narrowing (0–24)7 (3–8)9 (4–13)
Erosions (0–48)4 (3–6)6 (3–12)
Bone attrition (0–16)1 (0–3)1 (0–5)
Cysts (0–16)0 (0–1)0 (0–1)
Malalignment (0–16)0 (0–1)0 (0–1)
Synovitis (0–24)6 (4–7)8 (5–10)
Flexor tenosynovitis (0–24)1 (0–2)1 (0–3)
BMLs (0–48)1 (0–2)1 (0–3)
CL5 (3–7)8 (4–12)
Absence/discontinuity (0–16)
BMLs at CL insertions (0–32)0 (0–2)0 (0–2)
  • Achievable ranges for MRI sum scores are presented in brackets (for some features both the proximal and distal parts of the joints were assessed). The achievable range for the number of affected joints was 0–8 for all features.

  • BMLs, bone marrow lesions; CL, collateral ligament.