Gravity center estimation for evaluation of standing whole body compensation using virtual barycentremetry based on biplanar slot-scanning stereoradiography - validation by simultaneous force plate measurement

Table 5 Coordinates (x, y) in cm of the gravity center and the body weight in kg among groups

*Parameter*			*Normal*(n = 10)	*Degenerative*(n = 10)	*Deformative*(n = 10)
Coordinate	x (cm)	Avatar	−0.19 ± 0.42 (−1.15/0.77)^*1	−1.55 ± 0.31 (−2.25/−0.85) ^*2	−0.32 ± 0.24 (− 0.86/0.23) ^*3
	x (cm)	Force plate	− 0.22 ± 0.43 (−1.21/0.77)	−1.69 ± 0.31 (− 2.4/− 0.99)	−1.29 ± 0.46 (− 2.33/− 0.24)
	y (cm)	Avatar	0.09 ± 0.22 (− 0.4/0.58) ^*4	0.26 ± 0.23 (− 0.25/0.78) ^*5	0.36 ± 0.30 (− 0.31/1.04) ^*6
	y (cm)	Force plate	− 0.16 ± 0.19 (− 0.6/0.28)	−0.01 ± 0.30(− 0.68/0.65)	0.05 ± 0.31 (− 0.65/0.76)
BW (kg)		Avatar	62.1 ± 2.5 (56.4/67.7) ^*7	61.6 ± 3.9 (52.6/70.5) ^*8	63.2 ± 3.3 (55.7/70.7) ^*9
		Force plate	61.1 ± 2.3 (55.9/66.3)	60.8 ± 4.2 (51.4/70.2)	62.0 ± 3.5 (54.1/69.9)
		Scales	60.7 ± 2.5 (55.0/66.4)	60.7 ± 4.0 (51.7/69.7)	61.9 ± 3.4 (54.2/69.6)

Mean value ± standard error, lower / upper 95% confidence intervals, BW body weight
Coordinate (X, Y) was compared by paired t-test, and BW was compared by ANOVA in each group
*1: v.s. Force plate, p = 0.7170, *2: v.s. Force plate, p = 0.6850, *3: v.s. Force plate, p = 0.555, *4: v.s. Force plate, p = 0.0002, *5: v.s. Force plate, p = 0.0136, *6: v.s. Force plate, p = 0.0024, *7: v.s. Force plate and Scales, p = 0.9177, *8: v.s. Force plate and Scales, p = 0.9864, *9: v.s. Force plate and Scales, p = 0.9590

ISSN: 1471-2474