Table 1.

Results of assessments of headache variables pretreatment and posttreatment (N = 49)

	Pretreatment		Posttreatment
Variable	mean	SD	mean	SD	F value	η 2	CI
Headache frequency	20.94	9.93	12.69	10.92	26.39*	0.36	5.02–11.47
Headache severity	6.93	1.75	5.77	2.33	8.91†	0.16	0.38–1.96
Headache duration	11.55	5.50	7.73	6.00	18.05*	0.27	2.01–5.62

^*P > 0.001

^†> 0.01;

for all univariate analyses, degrees of freedom were 1,48; CI = 95% confidence interval. For the MANOVA: Wilks’ λ = 0.55, approximate F(3,46) = 12.50, P > 0.001, η² = 0.45.