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. Author manuscript; available in PMC: 2013 Mar 11.
Published in final edited form as: Cephalalgia. 2011 Mar 11;31(10):1082–1089. doi: 10.1177/0333102411398155

Figure 2.

Figure 2

Headache frequency pre- and post-aneurysm treatment.

A. Headache frequency pre- and post-aneurysm treatment in all patients. Examination of the whole sample (n=44) reveals a significant reduction in headache frequency (headache days/90 days) following aneurysm treatment. Six-month headache frequency was significantly lower than pretreatment frequency (13 days/90 days vs. 31 days/90 days, p=0.02). Values are group means. Error bars indicate + 1 SD. *indicates p=0.02.

B. Headache frequency pre- and post-aneurysm treatment in patients with active pretreatment headaches. Examination of patients with active headache disorders prior to aneurysm treatment (n=28) reveals a significant reduction in headache frequency (headache days/90 days) following aneurysm treatment. Six-month headache frequency was significantly lower than pretreatment frequency (24 days/90 days vs. 49 days/90 days, p=0.03). Values are group means. Error bars indicate + 1 SD. *indicates p=0.03.