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Table 2 Overview of intermodality agreement

From: The impact of limb loading and the measurement modality (2D versus 3D) on the measurement of the limb loading dependent lower extremity parameters

INTERMODALITY AGREEMENT ICC

 

2D WB versus 2D NWB

2D NWB versus 3D

HKA

 ICC (95% CI)

0.937 (0.866–0.966)

0.968 (0.950–0.979)

 MAD: Mean ± SD

1.7 ± 1.3 (0–5.2)

1.1 ± 1.0 (0–5.0)

 T-Test (Mean ± SD (p-value))

5.5° ± 4.8 versus 4.5° ± 3.6 (p < 0.001)

4.5° ± 3.6 versus 4.2° ± 4.0 (p = 0.09)

JLCA

 ICC (95% CI)

0.520 (0.253–0.690)

0.498 (− 0.166–0.764)

 MAD: Mean ± SD

1.9 ± 1.9 (0–14.0)

2.5 ± 1.7 (0.2–9.1)

 T-Test (Mean ± SD (p-value))

2.2° ± 2.5 versus 1.2° ± 1.9 (p < 0.001)

1.2° ± 1.9 versus 3.5° ± 2.2 (p < 0.001)

  1. Intraclass correlation coefficient (ICC), two-dimensional (2D), three-dimensional (3D), weight-bearing (WB), non-weight-bearing (NWB), hip-knee-ankle angle (HKA), joint line convergence angle (JLCA), confidence interval (CI), mean absolute difference (MAD), and standard deviation (SD)