Table 4. Crude and adjusteda from baseline to 3 years for objective measures.
| Crude change | Adjusted Change | Adjusted Differenceb |
Adjusted Differenceb With Imputatione |
|||
|---|---|---|---|---|---|---|
| SMPA | Non-SMPA | SMPA | Non-SMPA | |||
|
| ||||||
|
Objective Measures |
N = 39 | N = 66 | N = 39 | N = 66 | N = 105 | N = 162 |
|
| ||||||
|
Grip Strengthc |
.5 (−1.5, 2.5) | 1.5 (.3, 2.6) | .9 (−.4, 2.2) | 1.5 (.6, 2.5) | −.6 (−2.2, 1.0) | .3 (−2.0, 2.6) |
|
Jebsen- Taylord Test |
6.5 (2.0, 11.1) | 2.6 (−.0, 5.1) | 6.7 (3.8, 9.6) | 2.5 (.2, 4.7) | 4.2 (.5, 7.9)* | 9.7 (−32.7, 13.3) |
|
Two Point Pinchc |
−.1 (−0.5, 0.2) | −.2 (−.5, 0.3) | −.2 (−.4, .1) | −.2 (−.5, −.0) | .1 (−.2, .4) | .1 (−.4, .6) |
|
Three Point Pinchc |
−.0 (−.4, 0.4) | −.3 (−.6, −0.1) | −.0 (−.3, .3) | −.3 (−.5, −.1) | .3 (−.0, .7) | .3 (−.2, .8) |
| Key Pinchc | −.2 (−.7, .2) | −.4 (−.8, −.1) | −.2 (−.6, .1) | −.4 (−.7, −.2) | .2 (−.2, .7) | .7 (−.6, 2.0) |
|
Average Ulnar Driftd |
20.6 (16.0, 25.3) | −.9 (−4.5, 2.6) | 21.2 (17.8, 24.6) | −1.1 (−3.8, 1.6) | 22.3 (17.9, 26.6)** | 19.8 (12.0, 27.6)** |
|
Average Extensor Lagd |
30.4 (22.7, 38.1) | −7.9 (−11.5, −4.4) | 31.7 (27.1, 36.2) | −7.7 (−11.2, −4.1) | 39.3 (33.6, 45.1)** | 38.9 (27.5, 50.4)** |
|
MCPf Arc of Motionc |
9.2 (3.1, 15.3) | −9.5 (−13.2, −5.8) | 10.1 (6.2, 14.0) | −9.2 (−12.3, −6.2) | 19.3 (14.4, 24.3)** | 19.0 (12.3, 25.7)** |
|
PIPg Arc of Motionc |
6.9 (1.4, 12.4) | −2.6 (−5.2, 0.0) | 7.5 (4.2, 10.9) | −2.6 (−5.2, 0.1) | 10.1 (5.8, 14.3)** | 10.4 (−4.3, 25.2)** |
Cell values are means (95% confidence interval).
Using random effects model with baseline and year 3 outcome values as dependent variable and adjusted for baseline values of the outcome variable, age, gender, baseline severity stage, education level, income level, study site, 3 year indicator, SMPA group indicator and SMPA group by 3 year time interaction.
Between group differences at three years; positive scores reflect better outcomes in SMPA group relative to non-surgical group
Changes are calculated as 3 year minus baseline values, and positive values reflect improvement
Changes are calculated as baseline minus 3 year values, and positive values reflect improvement
Based on five imputations
Metacarpophalangeal joint
Proximal interphalangeal joint
p<0.05
p<0.001