Table 2.

Multiple linear regression to evaluate the effect of clinical (independent) variables on ΔCBF (dependent variable).

	ΔCBF (dependent variable)
Independent variables	Unstandardized beta coefficient ± SE	p
Population-related variables
Age (years)	−0.270 ± 0.203	0.232
Literacy (years)	0.163 ± 0.403	0.701
Disease Duration (years)	0.255 ± 0.131	0.100
Headache impact test-6 score	−0.708 ± 0.346	0.087
Time between evaluations (days)	0.023 ± 0.023	0.351
Attack-related variables
Attack duration (h)	−0.027 ± 0.141	0.854
Pain intensity [Visual Analog Scale (VAS)]	0.076 ± 2.416	0.976
Nausea intensity (VAS)	−0.377 ± 2.462	0.884
Photophobia intensity (VAS)	−0.307 ± 1.662	0.861
Phonophobia intensity (VAS)	−0.317 ± 1.666	0.857
Worsening with P. effort (VAS)	0.490 ± 1.967	0.813

p = significance level.