CRP and migraine disorder: Among more recently performed cross-sectional large-scale population-based studies, our main results are in accordance with the results from Tromsø in Northern Norway, including 20,486 participants, reporting an association between elevated hs-CRP for migraine ≥7 days/month (OR 1.22, 95% CI 1.01–1.46), but not for migraine less than 7 days/month [3].