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Table 1 Gait parameters for optical tracking system (OTS) and inertial measurement units (IMU)

From: Validation of inertial measurement units with optical tracking system in patients operated with Total hip arthroplasty

  OTS IMU Wilcoxon Intraclass correlation
Mean 95% C.I. Median Mean 95% C.I. Median P-value# ICC (CI)¤
Pelvic range degree 5.4 4.5–6.3 4.5 4.9* 4.4-5.3 4.6 0.95 0.08 (−0.20–0.35)
Hip ext./flex range right degree 36.8 35.2–38.5 36.2 34.0 32.2–35.9 33.4 < 0.001 0.75 (0.34–0.89)
Hip ext./flex range left degree 37.7 36.0–39.4 38.3 34.4 32.7–36.2 34.4 < 0.001 0.73 (0.22–0.89)
Knee ext./flex range right degree 55.1 53.5–56.7 55.0 54.9 53.1–56.6 53.9 0.75 0,83 (0,72-0,90)
Knee ext./flex range left degree 54.4 52.8–55.9 54.2 54.4 52.8–56.0 54.9 0.69 0.86 (0.77–0.92)
  1. *Mean of right and left side
  2. #P-values refer to Wilcoxon sign ranks test between OTS and IMU
  3. ¤Intraclass correlation coefficient (ICC) and 95% confidence interval (CI)