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Table 2 PLS-DA model details during single- and dual-task walking for the three groupsa

From: Gait characteristics and their discriminative power in geriatric patients with and without cognitive impairment

Gait outcome Variance captured per LV (%) VIP-values
   Single-task Dual-task
  LV1 LV2 LV3 LV4 Total HO CI CIM HO CI CIM
Gait speed 78 5 1 3 86 1.4 0.5 1.3 1.7 1.2 1.5
RMS AP 58 4 0 0 62 1.0 0.7 0.8 1.1 1.2 0.9
RMS ML 47 1 12 3 62 1.3 0.5 1.2 1.3 0.9 1.1
RMS V 76 0 3 2 81 2.0 1.2 1.9 2.2 1.6 1.8
IH AP 53 1 3 1 58 1.3 0.9 1.5 1.1 0.8 0.9
IH ML 0 0 24 8 33 0.2 0.4 0.5 0.1 0.0 0.2
IH V 3 11 11 13 37 0.3 1.7 0.2 0.2 0.1 0.1
Cross-SampEn AP-ML 42 19 0 6 68 0.8 1.2 0.7 1.0 1.4 0.8
Cross-SampEn AP-V 34 3 15 20 72 0.8 0.3 0.7 1.1 0.7 1.0
Cross-SampEn ML-V 30 4 8 19 61 0.7 0.9 0.9 1.2 0.8 1.1
Step Regularity AP 57 2 8 5 72 1.0 0.5 0.9 1.1 0.7 0.9
Step Regularity V 77 0 4 0 82 1.4 0.3 1. 3 1.3 1.0 1.0
Stride Regularity AP 73 0 9 3 85 1.4 0.5 1.3 1.3 0.9 1.0
Stride Regularity V 82 0 10 1 93 1.5 0.3 1.3 1.5 1.1 1.1
Symmetry AP 30 2 11 4 47 0.5 0.8 0.7 0.5 0.3 0.6
Symmetry V 44 3 24 0 71 0.9 0.9 1.4 0.9 0.6 0.8
Mscale-En AP 19 1 26 5 51 0.3 0.2 0.7 1.8 0.6 3.6
Mscale-En ML 0 47 0 5 51 0.7 3.2 0.3 0.4 0.6 0.5
Mscale-En V 18 20 16 0 53 1.2 3.5 1.0 1.0 2.4 1.4
max-Lyap AP 23 0 8 14 45 0.7 0.4 0.8 1.4 1.0 1.1
max-Lyap ML 20 20 24 2 66 1.5 2.3 1.4 0.5 0.3 0.6
max-Lyap V 53 4 5 2 64 1.3 1.1 1.4 0.3 3.5 0.8
FreqVar AP 35 3 0 3 41 1.0 0.7 0.8 0.3 1.2 0,4
  1. aExplained variance (%) per LV for the single-task model, and VIP-values for healthy old (HO) adults, Cognitive Intact (CI) geriatric and Cognitive Impaired (CIM) geriatric patients during single- and dual task walking. A VIP > 1.0 denotes considerable importance of the gait outcome to the particular group (bold). LV latent variable, VIP Variable Importance in Projection, RMS Root Mean Square, IH Index of Harmonicity, Cross-SampEn Cross Sample Entropy, Mscale-En Multi-scale Entropy, max-Lyap maximal Lyapunov Exponent, FreqVar Frequency Variability, AP Anterior-Posterior, ML Medio-Lateral, V Vertical