Recommended number of strides for automatic assessment of gait symmetry and regularity in above-knee amputees by means of accelerometry and autocorrelation analysis

Table 3 Minimum number of strides for proper computation of Ad1_AP and Ad2_V

	AMP	CTRL	P
Excluding initial and final 1500 samples in autocorrelation sequence
Min. number of strides (Ad1_AP)	2.21 ± 0.23¹	2.03 ± 0.21²	0.26
Min. number of strides (Ad2_V)	3.57 ± 0.44¹	3.43 ± 0.42²	0.49
All samples in autocorrelation sequence
Min. number of strides (Ad1_AP)	15.68 ± 2.00³	25.71 ± 1.85³	0.0014
Min. number of strides (Ad2_V)	20.81 ± 1.76⁴	33.78 ± 1.99⁴	0.0033

AMP - amputees; CTRL - control subjects. Two cases were considered: acceleration signals analyzed excluding initial and final portions (upper part of the table), and also including those signal portions (lower part of the table). Reported values are mean ± standard error (SE).
¹ paired t-test: P = 0.0029; ² P = 0.0009; ³ P = 0.0001; ⁴ P = 0.0001

ISSN: 1743-0003