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. Author manuscript; available in PMC: 2016 Jan 31.
Published in final edited form as: Gait Posture. 2014 Dec 4;41(2):482–487. doi: 10.1016/j.gaitpost.2014.11.012

Table 4.

Test-retest reliability for normal (n=21) and low vision (n=14) groups in different sensory conditions

FIRM-EO FIRM-EC FOAM-EO FOAM-EC
ICC (95% CI) SEM MD ICC (95% CI) SEM MD ICC (95% CI) SEM MD ICC (95% CI) SEM MD
NORMAL
 Magnitude
  SD amplitude (mm) AP 0.79 (0.48 0.92) 2.91 ±8.06 0.88 (0.71 0.95) 0.73 ±2.02 0.85 (0.61 0.94) 1.91 ±5.30 0.79 (0.47 0.92) 2.80 ±7.75
ML 0.80 (0.51 0.92) 0.34 ±0.94 0.84 (0.61 0.94) 0.31 ±0.85 0.76 (0.41 0.90) 1.22 ±3.38 0.82 (0.57 0.93) 1.01 ±2.81
  SD velocity (mm/s) AP 0.84 (0.60 0.93) 2.42 ±6.72 0.91 (0.77 0.96) 2.73 ±7.56 0.84 (0.60 0.93) 4.60 ±12.76 0.74 (0.36 0.90) 10.60 ±29.38
ML 0.80 (0.52 0.92) 1.85 ±5.14 0.81 (0.51 0.92) 1.93 ±5.34 0.69 (0.26 0.88) 3.35 ±9.28 0.62 (0.12 0.84) 4.28 ±11.87
  MTV (mm/s) 0.78 (0.46 0.91) 1.25 ±3.47 0.90 (0.75 0.96) 1.10 ±3.06 0.90 (0.73 0.96) 1.09 ±3.01 0.76 (0.19 0.92) 3.01 ±8.35
 Structure
  ApEn AP 0.82 (0.55 0.93) 0.09 ±0.25 0.93 (0.77 0.97) 0.04 ±0.12 0.85 (0.62 0.94) 0.05 ±0.15 0.88 (0.71 0.95) 0.04 ±0.12
  ApEn ML 0.94 (0.84 0.97) 0.07 ±0.20 0.91 (0.79 0.97) 0.08 ±0.23 0.86 (0.66 0.94) 0.14 ±0.38 0.94 (0.85 0.98) 0.08 ±0.21
LOW VISION
 Magnitude
  SD amplitude (mm) AP 0.85 (0.54 0.95) 0.80 ±2.21 0.90 (0.63 0.97) 0.89 ±2.47 0.93 (0.78 0.98) 2.03 ±5.62 0.89 (0.66 0.97) 1.78 ±4.93
ML 0.73 (0.15 0.91) 0.47 ±1.30 0.78 (0.34 0.93) 0.38 ±1.07 0.91 (0.71 0.97) 1.58 ±4.37 0.83 (0.48 0.95) 1.12 ±3.11
  SD velocity (mm/s) AP 0.88 (0.64 0.96) 4.65 ±12.88 0.88 (0.60 0.96) 5.33 ±14.76 0.94 (0.82 0.98) 7.63 ±21.14 0.95 (0.84 0.98) 5.47 ±15.17
ML 0.92 (0.76 0.98) 1.59 ±4.42 0.79 (0.34 0.93) 2.57 ±7.13 0.90 (0.69 0.97) 3.07 ±8.51 0.94 (0.82 0.98) 1.90 ±5.27
  MTV (mm/s) 0.90 (0.71 0.97) 1.54 ±4.27 0.88 (0.61 0.96) 1.65 ±4.58 0.94 (0.70 0.98) 2.76 ±7.65 0.88 (0.23 0.97) 2.62 ±7.27
 Structure
  ApEn AP 0.76 (0.24 0.92) 0.07 ±0.20 0.95 (0.85 0.98) 0.04 ±0.12 0.93 (0.77 0.98) 0.04 ±0.12 0.93 (0.70 0.98) 0.03 ±0.09
  ApEn ML 0.82 (0.43 0.94) 0.14 ±0.39 0.92 (0.75 0.97) 0.10 ±0.28 0.91 (0.72 0.97) 0.10 ±0.28 0.87 (0.59 0.96) 0.12 ±0.34

SD: Standard Deviation; MTV: Meant Total Velocity; EO: Eyes Open; EC: Eyes Closed; ApEn: Approximate Entropy; AP: anteroposterior; ML: mediolateral. ICC: Intraclass Correlation Coefficient; SEM: Standard Error of Measaurement: MD: Minimal Difference; All correlations are significant at p < 0.01