Statistics
headaches, headache
REGRESSION, SECONDARY, OTHER HEADACHE
The current analysis is a post-hoc secondary objective of the EVA Tyrol study. All statistical analyses were done with SPSS Version 27 (IBM, International Business Machines Corporation, Armonk, New York, United States of America). We focused on differences between MA and no headaches as well as MA and all other headaches. Univariate inter-group comparisons were done by the Mann-Whitney U test. We explored differences of PWV or cIMT between headache types with multivariable linear regression analysis. Linearity of all variables was investigated by scatterplots of residuals against fitted values, normality of residuals by Normal Q-Q-plots, and homoskedasticity by Spread-Location plots. The model was adjusted for variables with known effect on IMT or PWV from previous analyses [