Free-living gait does not differentiate chronic mTBI patients compared to healthy controls

Table 2 Free-living gait quality metrics; group differences whilst controlling for age and sex, Area under the Curve (AUC)

Free-living gait metric	mTBI (n = 32) mean (S.D.)	Controls (n = 23) mean (S.D.)	F	p	η_p²	AUC
Mean stance time (seconds, s)	0.83 (0.05)	0.85 (0.09)	0.19	0.66	0.00	0.44
Mean step time (s)	0.70 (0.05)	0.73 (0.09)	0.21	0.65	0.00	0.44
Mean stride time (s)	1.41 (0.10)	1.45 (0.18)	0.21	0.65	0.00	0.44
Mean swing time (s)	0.58 (0.05)	0.60 (0.09)	0.22	0.64	0.00	0.44
Mean stride length (centimetres, cm)	74.01 (4.10)	72.68 (3.60)	2.84	0.10	0.05	*0.63*
Mean stride velocity (cms⁻¹)	105.59 (8.88)	101.34 (11.47)	1.37	0.25	0.03	*0.60*
Stance time variability CV (s)	0.20 (0.01)	0.21 (0.02)	0.03	0.87	0.00	0.49
Step time variability CV (s)	0.20 (0.01)	0.20 (0.02)	0.10	0.75	0.00	0.48
Stride time variability CV (s)	0.22 (0.01)	0.22 (0.01)	0.35	0.56	0.01	*0.51*
Swing time variability CV (s)	0.20 (0.01)	0.21 (0.02)	0.13	0.72	0.00	0.47
Step length variability CV (s)	18.62 (1.18)	18.32 (0.96)	2.30	0.14	0.04	*0.61*
Step velocity variability CV (cms⁻¹)	36.90 (3.11)	35.48 (4.08)	1.18	0.28	0.02	*0.60*

Bolded p values; p < 0.05 (Bonferroni corrected p value 0.002). Group analysis of covariance results controlling for age and sex. mTBI, mild traumatic brain injury; S.D., standard deviation; CV, coefficient of variation, η_p² partial eta squared of effect size, F Wilks’ λ,
AUC > 0.50 in italics and bold

ISSN: 1743-0003