Assessment of Waveform Similarity in Clinical Gait Data: The Linear Fit Method

Table 2

Mean ± standard deviation (SD) of the values of LFM parameters for normative data obtained by healthy subjects and relevant values for patients with CVA. For healthy subjects the 95% interval of confidence (IC_95%) is reported, whereas for patients, the 𝑃 value of comparison with healthy subjects’ values is reported. 𝑅² and 𝑎₁ are adimensional coefficients, whereas 𝑎₀ is measured in degrees.

Mean ± SD; (IC95%)	Hip	Knee	Ankle
Mean ± SD; (IC95%) of healthy subjects
𝑅^2	0.99±0.01	0.97±0.02	0.89±0.06
	(0.98;0.99)	(0.96;0.98)	(0.86;0.92)
𝑎1	1±0.09	1±0.08	1±0.13
	(0.96;1.04)	(0.96;1.04)	(0.94;1.06)
𝑎0	0±7.48	0±7.51	0±4.12
	(−3.79;3.79)	(−3.80;3.80)	(−2.09;2.09)
Mean ± SD; (𝑃 of 𝑡-test) of subjects with impairment
𝑅^2	0.90±0.07	0.75±0.20	0.40±0.24
	(𝑃<0.001)	(𝑃<0.001)	(𝑃<0.001)
𝑎1	0.77±0.18	0.70±0.29	0.42±0.24
	(𝑃<0.001)	(𝑃<0.001)	(𝑃<0.001)
𝑎0	6.72±11.21	0.17±9.69	−0.09±6.40
	(𝑃=0.040)	(𝑃=0.953)	(𝑃=0.961)