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Table 2 Motion parameters recorded during voluntary lumbar frontal and horizontal plane motion

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

  Parameter Session 1 Session 2  
Mean (SD) Min Max Mean (SD) Min Max p value
Frontal plane: ROM lateral flexion (°) 48.4 (9.7) 19.9 73.4 48.5 (7.8) 20.5 81.2 0.838
Lateral flexion mean velocity (°/sec) 15.2 (6) 4.9 36.9 15.9 (6.1) 4.5 36.1 0.043
Phase-plot Area lateral flexion(°/(°/sec)) 3179 (1477) 509 7964 3333 (1458) 493 7532 0.045
Jerk index lateral flexion 11.3 (5.2) 3.6 36.3 10.8 (5.3) 3 34.9 0.052
Horizontal plane: ROM rotation (°) 35.6 (11.6) 5.9 62.6 38.3 (10.6) 5.1 63.8 0.0009
Rotation mean velocity (°/sec) 11.7 (5.3) 1.6 28.7 13.3 (5.8) 1.2 35.2 <0.0001
Phase-plot Area rotation(°/(°/sec)) 1826 (1083) 57 5254 2106 (1182) 40 6042 0.0002
Jerk index rotation 11.99 (4.53) 4.9 29.8 11.56 (4.77) 3.8 43.2 0.1358
  1. Min, minimum; Max, maximum; ROM, range of motion; SD, Standard deviation
  2. Means, standard deviations, range and P-value (t test) for all 219 patients flexion motion measurements with the OSI Spine Motion Analyzer
  3. All session values are the average of two subsequent trials with a ROM difference of 4° or less