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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
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