Virtual Visual Effect of Hospital Waiting Room on Pain Modulation in Healthy Subjects and Patients with Chronic Migraine

Table 1

Mean (M) and Standard Deviation (SD) values of subjective perception of laser pain measure by 0–100 Visual Analogic Scale (VAS) and latency and amplitude of laser-evoked potentials in Real Hospital (RH) and Imaginary Hospital (IH) virtual representation conditions.

			VAS	N1 Latency; msec	N1 Amplitude; uV	N2 Latency; msec	P2 Latency; msec	N2/P2 Amplitude; uV
Controls; N° 16	RH	M	30.5	169.45	6.31	216.37	321.87	24.58
		SD	13.5	43.40	3.78	29	85	9.48
	IH	M	34.5	162.45	7.71	219.32	308.12	26
		SD	18.5	39.97	3.58	29.9	45	16.08
Chronic migraine; N° 16	RH	M	31.5	174.75	4.16	248.11	366	20,27
		SD	23.3	21.5	2.31	45.11	37.7	8
	IH	M	29.3	167.5	5.99	225.22	338.1	14,24
		SD	22.3	39.97	4.33	42.45	32.2	6.6