Table 3. Two-Phase Association Between Radiographic Measures and Functional Outcomes at 12 Months Following Treatmenta.
| Outcome by Radiographic Variable by Age Groupb | Slope 1 (95% CI)c | P Value | Slope 2 (95% CI)c | P Value |
|---|---|---|---|---|
| Grip strength difference | ||||
| Radial inclincation | ||||
| Younger | −0.07 (−0.40 to 0.26) | .69 | −0.22 (−0.81 to 0.37) | .47 |
| Older | 0.07 (−0.19 to 0.33) | .61 | 1.07 (0.38 to 1.76) | .004 |
| Ulnar variance | ||||
| Younger | −2.16 (−6.05 to 1.72) | .28 | 0.29 (−0.46 to 1.03) | .46 |
| Older | −0.87 (−3.75 to 2.00) | .55 | 0.21 (−0.28 to 0.70) | .41 |
| Tilt | ||||
| Younger | 0.02 (−0.10 to 0.15) | .70 | −0.10 (−1.15 to 0.95) | .85 |
| Older | −0.11 (−0.20 to −0.01) | .03 | 0.23 (−0.65 to 1.10) | .61 |
| Arc of motion difference | ||||
| Radial inclincation | ||||
| Younger | 0.51 (−0.66 to 1.67) | .40 | 0.05 (−1.77 to 1.86) | .96 |
| Older | −0.73 (−1.93 to 0.46) | .23 | 2.39 (−0.74 to 5.51) | .14 |
| Ulnar variance | ||||
| Younger | −4.37 (−17.71 to 8.96) | .52 | 0.71 (−1.88 to 3.30) | .59 |
| Older | 12.74 (−1.25 to 26.74) | .08 | 1.37 (−0.88 to 3.62) | .24 |
| Tilt | ||||
| Younger | −0.32 (−0.74 to 0.11) | .15 | 1.41 (−1.87 to 4.69) | .40 |
| Older | 0.04 (−0.40 to 0.48) | .88 | 0.69 (−3.28 to 4.66) | .74 |
| Radial deviation difference | ||||
| Radial inclination | ||||
| Younger | 0.24 (−0.24 to 0.71) | .33 | 0.54 (−0.22 to 1.29) | .17 |
| Older | 0.68 (0.00 to 1.36) | .06 | 0.23 (−1.55 to 2.01) | .80 |
| Ulnar variance | ||||
| Younger | 0.24 (−5.28 to 5.76) | .93 | −0.02 (−1.09 to 1.05) | .97 |
| Older | −0.52 (−7.95 to 6.92) | .89 | −0.52 (−1.80 to 0.76) | .43 |
| Tilt | ||||
| Younger | 0.08 (−0.09 to 0.26) | .36 | −1.11 (−2.46 to 0.25) | .12 |
| Older | −0.15 (−0.40 to 0.10) | .25 | 0.36 (−1.89 to 2.62) | .75 |
| Ulnar deviation difference | ||||
| Radial inclination | ||||
| Younger | 0.18 (−0.31 to 0.68) | .47 | −0.16 (−0.94 to 0.62) | .68 |
| Older | −0.48 (−1.16 to 0.21) | .18 | 0.37 (−1.43 to 2.17) | .69 |
| Ulnar variation | ||||
| Younger | −1.42 (−7.15 to 4.32) | .63 | 0.23 (−0.88 to 1.34) | .69 |
| Older | 3.53 (−3.99 to 11.05) | .36 | 0.55 (−0.75 to 1.84) | .41 |
| Tilt | ||||
| Younger | −0.14 (−0.32 to 0.05) | .15 | −0.28 (−0.69 to 1.12) | .70 |
| Older | −0.01 (−0.27 to 0.24) | .91 | 0.51 (−1.77 to 2.79) | .66 |
a
Covariates included in the model are sex, race, highest educational level, income, smoking status, preinjury level of activity, employment status 12 months following treatment, and status of dominant-hand injury.
b
Age group defined by median age (70 years): age 60 to 69 years as the younger group and age 70 years or older as the older group.
c
Slope 1 was calculated from data points with radial inclination less than or equal to 22°, ulnar variance less than or equal to 0 mm, or tilt less than or equal to 11°; and slope 2 from those with radial inclination greater than 22°, ulnar variance greater than 0 mm, or tilt greater than 11°.