Descriptive statistics of motor performance and academic achievements scores.

Table 1: Descriptive statistics of motor performance and academic achievements scores.

	Mean	SD	Min.	Max.	Skewness	Skew SE
Raw ML sway variability
Dynamic 1	4.44	2.67	1.22	17.18	2.50	0.28
Dynamic 2	2.90	2.15	0.90	17.82	2.85	0.28
Dynamic 3	6.89	3.34	2.55	14.91	0.65	0.28
Static 1	2.55	2.09	0.40	12.58	2.47	0.29
Static 2	1.64	0.97	0.48	5.38	1.47	0.29
Static 3	5.47	3.48	1.01	14.95	0.92	0.29
Motor performance ratios
Ratio Dyn. 2/1	0.73	0.36	0.08	1.73	0.88	0.28
Ratio Dyn. 3/1	1.87	1.18	0.24	6.01	1.57	0.28
Ratio Stat. 2/1	0.83	0.55	0.22	3.03	2.41	0.29
Ratio Stat. 3/1	2.99	2.53	0.39	12.03	1.71	0.29
Academic achievements
Grammar	86.65	11.60	56	100	-0.95	0.28
Written expression	81.81	15.84	38	100	-0.63	0.28
Reading comprehension	83.34	12.41	45	100	-1.22	0.28
Total Verbal	83.54	10.93	53	98	-0.98	0.28
Whole numbers	81.19	17.96	23	100	-1.11	0.28
Fractions	75.61	24.87	6	100	-1.19	0.28
Geometry	86.31	17.29	25	100	-1.56	0.28
Total Math	79.73	18.79	24	100	-1.30	0.28

Note: ML: Medio-lateral; Dyn: Dynamic balance task; Stat: Static balance task. Raw ML scores represent the standard deviations of trunk tilt from body center (in degrees).