Isolated CMCJ OA (n = 117) | CMCJ plus IPJ OA (n = 63) | P value* | |
---|---|---|---|
Body structure | |||
Radiographic CMCJ OA severity (0–4, 0 = no CMCJ OA), median (IQR) | 3 (3,4) | 3 (3,4) | .82 |
Presence of clinical CMCJ subluxation, n (%) | 79 (73) | 34 (59) | .08 |
Radiographic CMCJ subluxation ratio, mean (SD) | 0.50 (0.09) | 0.48 (0.11) | .14 |
Number of finger joints with clinical nodes (0–9 joints), median (IQR) | 0 (0,0) | 3 (2,4) | <.001 |
Body function | |||
Pain at rest (0–10, 0 = no pain), median (IQR) | 3 (1,4) | 4 (2,5) | .05 |
Pain following measure of grip strength (0–10, 0 = no pain), median (IQR) | 3 (1,5) | 4 (2,5) | .41 |
Pain following measure of pinch strength (0–10, 0 = no pain), median (IQR) | 4 (1,6) | 4 (2,5) | .87 |
Max grip strength, Newton (N), median (IQR) | 176 (112,274) | 152 (101,196) | .03 |
Max pinch strength, N, median (IQR) | 31 (22,43) | 27 (19,34) | .02 |
Grip strength referred hand (% of normal grip strength), mean (SD) | 66 (26) | 61 (23) | .23 |
Pinch strength referred hand (% of normal pinch strength), mean SD | 63 (26) | 57 (22) | .12 |
Number of painful finger joints (MCPJ, IP, PIPJ, DIPJ: 0–14 joints), median (IQR) | 1 (0,3) | 5 (3,7) | <.001 |
Flexion deficit 2nd-5th fingers, mm, median (IQR) | 0 (0,0) | 0 (0,41) | <.001 |
Range of motion thumb IP, degrees, median (IQR) | 71 (64,80) | 65 (55,75) | .02 |
Range of motion MCP1, degrees, median (IQR) | 50 (41,60) | 49 (42,55) | .56 |
Palmar abduction thumb, degrees, median (IQR) | 49 (42,58) | 46 (39,51) | .01 |
Abduction CMCJ, degrees, median (IQR) | 37 (32,44) | 35 (29,40) | .02 |
Activity and participation | |||
Activity performance (1–4, 1 = no activity problems), mean (SD) | 1.9 (0.4) | 2.1 (0.4) | <.001 |
Function and symptoms arm, shoulder and hand (0–100, 0 = no disability), mean (SD) | 34.3 (15.7) | 41.6 (17.0) | .01 |