Table 2

Results of foot placement accuracy
Dance group (n = 8) Pwithin Control group (n = 9) Pwithin Pbetween
pre post pre post
Distance errors [mm]
Medio-lateral error 13.4 (10.0; 15.3) 10.1 (8.8; 11.95) 0.05* 12.9 (9.9; 16.2) 10.1 (8.7; 15.7) 0.44 0.70
Anterior-posterior error 16.6 (14.9; 29.2) 21.2 (15.1; 28.7) 0.33 21.7 (17.2; 26.9) 24.4 (15.5; 30.7) 0.17 0.63
Walking velocity [cm/s]
Condition 2 53.0 (45.0; 67.0) 62.0 (57.0; 75.0) 0.02* 53.0 (41.0; 68.0) 49.0 (34.5; 57.5) 0.81 0.03*
Condition 3 42.0 (34.0; 43.0) 47.0 (45.0; 49.0) 0.31 33.0 (25.5; 59.5) 41.0 (24.0; 64.0) 0.10 1.00
Quality evaluation (n, %)
Contact with leading foot
 medio-lateral 11 (2.8) 3 (0.8) 5 (1.1) 6 (1.3)
 anterior-posterior 17 (4.3) 8 (2.0) 21 (4.7) 10 (2.2)
Contact with subsequent foot 16 (4.0) 14 (3.5) 14 (3.1) 16 (3.6)
Wrong foot 2 (0.5) 2 (0.5) 5 (1.1) 2 (0.4)

Notes: Distance error (absolute values) and walking velocity values are displayed as group medians with interquartile ranges (q1; q3) due to non-normal distribution of data; * = significant within-group differences pre-post (Pwithin ≤ 0.05) calculated with Wilcoxon signed rank test; percentage values are defined as the quotient between number of contacts or wrong foot, respectively, divided by the sum of trials of the whole group.

Abbreviations: Pwithin: P-value for within-group comparison; Pbetween: P-value for between-groups comparison.

Pichierri et al.

Pichierri et al. BMC Geriatrics 2012 12:74   doi:10.1186/1471-2318-12-74

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