TABLE 4.

Headache symptoms before and after the onset of vertigo in group A.

Headache symptoms	Before (n = 86)	After (n = 86)	p-value
Frequency (times/3 months)	6 (3, 9)	3 (0, 8)	0.015
Duration (h)	24 (7.5, 36)	12 (2, 24)	0.001
Intensity (VAS score)	6 (5, 7)	5 (3, 6)	< 0.001
Accompanying symptoms
Nausea	44 (51%)	34 (40%)	0.126
Vomiting	29 (34%)	20 (23%)	0.128
Photophobia	38 (44%)	26 (30%)	0.058
Phonophobia	60 (70%)	47 (55%)	0.041
Osmophobia	8 (9%)	4 (5%)	0.369
Neck stiffness	23 (27%)	13 (15%)	0.061
Scalp allodynia	22 (26%)	14 (16%)	0.134
Number of accompanying symptoms	2 (2, 4)	2 (0, 3)	0.002

Group A: the onset of migraine was earlier than vertigo; VAS: visual analog scale.