Field testing primary stabbing headache criteria according to the 3rd beta edition of International Classification of Headache Disorders: a clinic-based study

Table 2 Clinical characteristics of primary stabbing headache by ICHD-3 beta criteria at initial visit according to the pain location between V1 and other than V1

	V1 region^a N = 28	Other than V1 region^b N = 252	P-value
Gender
Male	13 (46.4 %)	90 (35.7 %)	0.265
Female	15 (53.6 %)	162 (64.3 %)	0.265
Age	50.5 ± 13.4	51.5 ± 13.3	0.912
Visual analog scale for pain intensity	4.4 ± 1.3	4.7 ± 1.6	0.160
Improvement at follow-up^c	22 (100.0 %)	204 (95.3 %)	0.301
Mean duration of improvement (days) among responders	4.1 ± 3.1	3.5 ± 2.7	0.135
Preceding infection	4 (14.2 %)	17 (6.7 %)	0.151
Stressful event history	2 (7.1 %)	59 (23.4 %)	0.048
Allodynia	8 (28.5 %)	45 (17.8 %)	0.170

^aOne patient had stabbing headache in both the V1 and V2 regions
^bV2, V3, lesser occipital nerve, greater occipital nerve, great auricular nerve, and multiple dermatomes. One patient with multiple dermatomes, including V1, were included
_c22 out of 28 patients with pain at V1 region and 216 out of 252 patients with pain at other than V1 regions were followed at 2 weeks after initial visit, respectively
ICHD-3 beta: the third beta edition of the International Classification of Headache Disorders. V1: ophthalmic branch of trigeminal nerve; V2: maxillary branch of trigeminal nerve; V3 mandibular branch of trigeminal nerve

ISSN: 1129-2377