Postural control processes during standing and step initiation in autism spectrum disorder

Table 2 Estimated means and effect sizes for postural control and step initiation measurements

	ASD (n = 17)	TD (n = 20)	Effect size	p
Neutral stance
COP_ML (cm)	0.44 (0.06)	0.26 (0.05)	0.73	0.04*
COP_AP (cm)	0.61 (0.07)	0.47 (0.06)	0.50	0.15
MI (bit)	0.61 (0.04)	0.55 (0.04)	0.32	0.35
COP Length (cm)	34.65 (3.91)	24.11 (3.59)	0.65	0.06
Romberg 1
COP_ML (cm)	0.77 (0.06)	0.62 (0.06)	0.58	0.10
COP_AP (cm)	0.83 (0.10)	0.58 (0.09)	0.62	0.08
MI (bit)	0.66 (0.02)	0.62 (0.02)	0.44	0.20
COP length (cm)	44.36 (4.01)	36.23 (3.68)	0.49	0.16
Circular sway
COP_ML (cm)	7.36 (0.48)	6.89 (0.44)	0.24	0.49
COP_AP (cm)	3.80 (0.24)	4.03 (0.22)	0.24	0.49
MI (bit)	0.57 (0.04)	0.69 (0.03)	0.83	0.02*
COP length (cm)	454.84 (40.95)	351.81 (37.55)	0.61	0.08
Stepping
Maximum APA (cm)	4.57 (0.49)	4.54 (0.48)	0.01	0.97
APA duration	0.49 (0.05)	0.43 (0.05)	0.29	0.41
Body transfer duration (second)	0.18 (0.01)	0.24 (0.01)	1.11	0.003**
Mean body transfer velocity (cm/second)	194.73 (14.65)	144.62 (13.43)	0.83	0.02*
Maximum ML (cm)	10.82 (0.80)	13.02 (0.77)	0.67	0.06

Note. COP_ML COP variability in the ML direction, COP_AP COP variability in the AP direction, MI mutual information, COP Length COP trajectory length, Maximum ML body transfer maximum lateral sway
Covariates appearing in the model are evaluated at the following value: Height = 155.130 cm. Effect size was calculated using Cohen’s d. Data are reported as estimated mean and standard error in parentheses
*p < 0.05 level; **p < 0.01

ISSN: 1866-1955