Table 3

Mean subjective rating across time points

	Baseline	Active phase		Placebo phase		P value
	Baseline	4 weeks	12 weeks	4 weeks	12 weeks	P value
HIT-6	60.8±8.77	59.2±8.56	57.9±8.64	55.8±9.49	58.1±9.22	0.65
PRI	16.2±10.6	12.6±8.8	14.3±12.5	13.1±10.6	14.8±10.1	0.81
PPI-VAS	56.9±26.7	41.9±26.6	44.6±27.1	46.9±28.8	53.9±29.9	0.33
SFMcGill(III)	2.93±1.28	2.25±1.11	2.12±1.24	2.48±1.39	2.58±1.33	0.19
ESS	7.55±4.82	6.65±4.61	6.85±4.53	7.15±4.83	7.42±4.80	0.92

ESS, Epworth Sleepiness Scale; HIT-6, Headache Impact Test-6; PPI-VAS, present pain intensity Visual Analogue Scale; PRI, Pain Rating Index; SFMcGill(III), Short Form McGill overall intensity of pain experience .