STEADFAST: Psychotherapeutic Intervention Improves Postural Strategy of Somatoform Vertigo and Dizziness

Table 2

Comparison of body sway activity in SVD patients and healthy subjects by fast Fourier transformation (FFT). Results: values of sway activity analyzed by a fast Fourier transform (FFT) in different frequency ranges. For characterization of effect sizes, the -values are also displayed. Significantly elevated body sway for the horizontal plane and the vertical direction was observed for frequencies up to 8 Hz; a significantly reduced body sway activity was observed in the high frequency range.

Univariate ANOVA
Patients with somatoform vertigo () versus healthy controls ()
	FFT Integral 0.1–2.4 Hz			FFT Integral 2.4–3.5 Hz
	EO				Sway ↑
ns		ns	ns		ns	ns
EC		Sway ↑	Sway ↑		Sway ↑
			ns		ns	ns
	EO-Reclin	Sway ↑	Sway ↑
			ns	ns	ns	ns
EC-Reclin		Sway ↑	Sway ↑		Sway ↑
			ns		ns	ns
	EO-Foam
ns		ns	ns	ns	ns	ns
EC-Foam		Sway ↑	Sway ↑	Sway ↑
				ns	ns	ns
	EO-Reclin-Foam
ns		ns	ns	ns	ns	ns
EC-Relin-Foam			Sway ↑
	ns		ns	ns	ns	ns
	EO-Tandem-Foam		Sway ↑
ns			ns	ns	ns	ns
EC-Tandem-Foam						Sway ↑
	ns	ns	ns	ns		ns
		FFT Integral 3.5–8 Hz			FFT Integral 11–19 Hz
EO					Sway ↓
	ns	ns	ns	ns		ns
	EC				Sway ↓	Sway ↓
ns		ns	ns			ns
EO-Reclin					Sway ↓	Sway ↓
	ns	ns	ns			ns
	EC-Reclin				Sway ↓	Sway ↓
ns		ns	ns			ns
EO-Foam		Sway ↑				Sway ↓
		ns	ns	ns		ns
	EC-Foam	Sway ↑	Sway ↑	Sway ↑		Sway ↓
				ns		ns
EO-Reclin-Foam				Sway ↑	Sway ↓	Sway ↓
	ns	ns				ns
	EC-Relin-Foam			Sway ↑
ns		ns		ns	ns	ns
EO-Tandem-Foam				Sway ↑	Sway ↓	Sway ↓
	ns	ns				ns
	EC-Tandem-Foam
ns		ns	ns	ns	ns	ns