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Table 3 Overall reliability lumbar spinal motion parameters in the frontal and horizontal planes

From: Reliability and measurement error of frontal and horizontal 3D spinal motion parameters in 219 patients with chronic low back pain

  Parameter (n = 219) Reliability Agreement  
ICC(1,1) (95 % CI) 95 % LOA SEM
Frontal plane: ROM (°) lateral flexion 0.68 0.61 0.75 −15.4 - 15.2 8.02
Lateral flexion mean velocity (°/sec) 0.71 0.64 0.77 −9.7 - 8.4 5.11
Phase-plot Area lateral flexion (°/(°/sec)) 0.7 0.63 0.77 −2368 - 2060 1228.91
Jerk index lateral flexion 0.73 0.66 0.79 −7.06 - 8.08 4.48
4Horizontal plane: ROM (°) rotation 0.44 0.33 0.54 −25.3 - 20.1 3.54
Rotation mean velocity (°/sec) 0.53 0.43 0.62 −11.8 - 8.7 4.08
Phase-plot Area rotation (°/(°/sec)) 0.5 0.4 0.6 −2455 - 1896 806.82
Jerk index rotation 0.58 0.49 0.67 −7.93 - 8.79 3.54
  1. CI, confidence interval; ICC, intraclass correlation coefficients; LOA, Bland-Altman limits of agreement; ROM, range of motion; SEM, standard error of measurement