Figure 4From: A comparative study on approximate entropy measure and poincaré plot indexes of minimum foot clearance variability in the elderly during walkingSurrogate analysis. Relationship of mean MFC with ApEn for the falls-risk elderly subjects (asterisk) and for the randomly shuffled MFC data sets of the same elderly subjects (solid square). Insignificant correlation (p > 0.05) was found in the reshuffled data sets. r = Correlation coefficient.Back to article page