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Table 3 Acceleration-based values from the GG and GC phases (N = 30)

From: Differences in trunk accelerometry between frail and non-frail elderly persons in functional tasks

  Frail (n = 14) Non-frail (n = 16) U d p-Value
  Median (IQR) Median (IQR)    
GG
t.stopwatch (s) 10.23 (7.82 / 15.04) 3.71 (2.45 / 3.98) 0.000 2.119 <0.001
x.acc.max (m/s2) 2.06 (1.64 / 2.45) 5.84 (3.55 / 8.78) 14.00 -1.479 <0.001
x.acc.min (m/s2) -2.45 (-2.77 /-1.89) -5.93 (-6.87 / -4.51) 9.00 1.910 <0.001
y.acc.max (m/s2) 2.50 (2.25 / 3.04) 9.59 (7.81 / 10.89) 0.000 -5.212 <0.001
y.acc.min (m/s2) -2.50 (-3.35 / -2.04) -9.07 (-12.71 / -5.63) 13.00 1.578 <0.001
y.acc.mean (m/s2) 0.15 ( 0.09 / 0.22) 0.46 (0.29 / 1.13) 29.00 -1.234 0.002
z.acc.min (m/s2) -1.96 (-3.95 / -1.08) -7.64 (-0.48 / -6.52) 0.000 3.303 <0.001
z.acc.mean (m/s2) -0.57 (-1.62 / 0.58) -2.72 (-9.99 / -2.39) 18.00 1.936 <0.001
rv.acc.max ( m/s2) 4.03 (3.22 / 4.99) 11.71 (10.33 / 13.87) 0.000 -1.957 <0.001
rv.acc.min ( m/s2) 0.42 (0.14 / 0.85) 1.54 (0.97 / 2.47) 29.00 -1.258 0.002
rv.acc.mean ( m/s2) 1.91 (1.51 / 2.33) 6.03 (5.27 / 6.75) 0.000 -4.776 <0.001
GC
t.stopwatch (s) 5.91 (4.54 / 10.45) 1.85 (1.55 / 2.21) 8.00 1.923 <0.001
x.acc.max (m/s2) 2.35 (1.83 / 2.62) 5.03 (3.54 / 7.35) 19.00 -1.587 <0.001
x.acc.min (m/s2) -2.40 (-3.26 / -1.81) -5.56 (-7.95 / -3.95) 13.00 1.859 <0.001
y.acc.max (m/s2) 2.35 (1.94 / 2.97) 9.26 (8.50 / 11.07) 0.000 -5.436 <0.001
y.acc.min (m/s2) -2.59 (-3.38 / -2.06) -8.25 (-15.62 / -5.43) 13.00 1.389 <0.001
y.acc.mean (m/s2) 0.18 (0.11 / 0.26) 0.38 (0.31 / 1.12) 24.00 -1.199 <0.001
z.acc.mean (m/s2) -0.45 (-1.81 / 0.61) -2.98 (-4.62 / -2.35) 17.00 2.024 <0.001
rv.acc.max ( m/s2) 4.31 (3.39 / 5.03) 11.85 (9.18 / 16.26) 0.000 -1.802 <0.001
rv.acc.min ( m/s2) 0.33 (0.21 /0.65) 1.53 (0.64 / 3.13) 30.00 -1.292 0.002
rv.acc.mean ( m/s2) 1.96 (1.49 / 2.64) 5.79 ( 5.31 / 6.97) 0.000 -4.859 <0.001
  1. x, x axis; y, y axis; z, z axis; acc, acceleration; t, time; max, maximum; min, minimum; rv, resultant vector; U, U-Mann–Whitney; GG, Gait Go; GC, Gait Come; d, Cohen’s d; IQR, interquartil range (percentil 25% / percentil 75%).