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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)