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Table 2 Mean measured values and results of univariate linear regression analyses for the impact of rotation on tilt, radial inclination, and ulnar variance using RSA values of rotation (n = 147)

From: The effect of forearm rotation on radiographic measurements of the wrist: an experimental study using radiostereometric analyses on cadavers

  

Mean ± SD (range)

Slope (95% CI)

R2

p-value

Tilt (dorsal/palmar)

O1

5.7 ± 9.1 (-22.0–21.3)

-0.68 (-0.87, -0.49)

0.25

< 0.001*

O2

7.1 ± 6.9 -14.9–21.3)

-0.44 (-0.60, -0.29)

0.19

< 0.001*

Radial inclination

O1

26.1 ± 2.6 (18.6–33.0)

0.05 (-0.02, 0.11)

0.02

0.139

O2

26.9 ± 2.4 (21.9–32.9)

0.08 (0.02, 0.13)

0.05

0.008*

Ulnar variance

O1

0.1 ± 1.5 (-3.7–4.6)

0.01 (-0.02, 0.05)

0.00

0.490

O2

-0.2 ± 1.9 (-4.6–4.4)

0.02 (-0.02, 0.07)

0.01

0.288

  1. CI Confidence interval, n Total number of images, R2 R-squared value, SD standard deviation, O1 Observer 1, O2 Observer 2. Tilt and radial inclination are reported in degrees (negative values for dorsal tilt, positive values for palmar tilt, ulnar variance in millimeters. *Statistical significance