Table 3.

Equilibrium test factors related to Niigata persistent postural-perceptual dizziness questionnaire improvement at 2 mo

		Estimate	SE	t value	P value
	(Intercept)	-0.18	0.31	-0.58	0.571
Static stabilometry	ACF	-0.01	0.005	-2.53	0.02a
	VRF	-0.30	0.19	-1.55	0.14
	ARF	0.33	0.11	2.99	0.01a
	VFCF	0.33	0.14	2.29	0.03a
	AFCF	-0.09	0.04	-2.34	0.03a
Dynamic stabilometry	FT value in closed eye	-0.03	0.02	-1.29	0.21
Vestibular function	CP (%) of caloric test	0.004	0.002	2.28	0.03a
	AR (%) of cVEMP	0.005	0.003	1.46	0.16
	AR (%) of oVEMP	-0.008	0.005	-1.47	0.16
Autonomic function	OD	0.77	0.11	6.65	< 0.001b

^a P < 0.05.

^b P < 0.01.

VCF: Center of pressure velocity in the eyes closed/foam rubber condition; ACF: Envelopment area tracing by movement of the center of pressure in the eyes closed/foam rubber condition; VRF: Romberg’s ratio of velocity with foam rubber; ARF: Romberg’s ratio of area with foam rubber; VFCF: Foam ratio of velocity in the eyes closed/foam rubber condition; FCF: Foam ratio of area in the eyes closed/foam rubber condition; FT value: Foulage test value; CP (%): Canal paresis in caloric test; AR (%): Asymmetry ratio; cVEMP: Cervical vestibular evoked myogenic responses; oVEMP: Ocular vestibular-evoked myogenic responses; OD: Orthostatic dysregulation. Residual standard error = 0.20 (df = 13; multiple R-squared = 0.81; adjusted R-squared = 0.67, F-statistic = 5.77 (df, 10 and 13; P value = 0.002, Akaike information criterion = -68.7).