Table 4. Two-Phase Association Between Radiographic Measures and Patient-Reported 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 |
|---|---|---|---|---|
| MHQ total score | ||||
| Radial inclination difference | ||||
| Younger | 1.31 (0.28 to 2.35) | .02 | −1.23 (−2.86 to 0.40) | .14 |
| Older | 0.30 (−0.68 to 1.29) | .55 | −0.91 (−3.48 to 1.66) | .49 |
| Ulnar variance | ||||
| Younger | −10.51 (−22.49 to 1.46) | .09 | 0.83 (−1.49 to 3.15) | .49 |
| Older | 9.09 (−1.67 to 19.85) | .10 | 1.74 (−0.09 to 3.56) | .07 |
| Tilt | ||||
| Younger | −0.04 (−0.42 to 0.34) | .85 | 1.98 (−0.96 to 4.93) | .19 |
| Older | −0.12 (−0.48 to 0.24) | .53 | −0.82 (−0.48 to 0.24) | .63 |
| MHQ function score difference | ||||
| Radial inclination | ||||
| Younger | 0.67 (−0.54 to 1.87) | .28 | 1.72 (−0.19 to 3.62) | .08 |
| Older | 0.20 (−1.21 to 1.61) | .78 | 3.13 (−0.56 to 6.82) | .10 |
| Ulnar variance | ||||
| Younger | −5.65 (−19.62 to 8.32) | .43 | −0.64 (−3.34 to 2.06) | .64 |
| Older | −9.75 (−25.19 to 5.70) | .22 | 1.37 (−1.25 to 3.99) | .31 |
| Tilt | ||||
| Younger | 0.10 (−0.35 to 0.55) | .66 | −2.54 (−5.97 to 0.89) | .15 |
| Older | −0.12 (−0.63 to 0.40) | .66 | 0.24 (−4.45 to 4.92) | .92 |
| MHQ ADL score difference | ||||
| Radial inclination | ||||
| Younger | 0.83 (0.03 to 1.63) | .05 | 0.71 (−0.56 to 1.97) | .28 |
| Older | 0.42 (−0.17 to 1.02) | .17 | 0.95 (−0.60 to 2.50) | .24 |
| Ulnar variance | ||||
| Younger | −3.56 (−12.82 to 5.71) | .45 | 0.83 (−0.96 to 2.63) | .37 |
| Older | −10.35 (−16.84 to −3.86) | .003 | 0.67 (−0.43 to 1.77) | .24 |
| Tilt | ||||
| Younger | 0.10 (−0.20 to 0.39) | .53 | −1.95 (−4.22 to 0.33) | .10 |
| Older | −0.05 (−0.26 to 0.17) | .68 | 0.56 (−1.41 to 2.53) | .58 |
Abbreviations: ADL, activities of daily living; MHQ, the Michigan Hand Outcomes Questionnaire.
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 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°.