Table 3.

Headache frequency, VAS score of headache intensity, and impact of headache in relation to the presence of insomnia among participants with migraine and non-migraine headache

	Migraine with insomnia (N = 37)	Migraine without insomnia (N = 106)	P	Non-migraine headache with insomnia (N = 171)	Non-migraine headache without insomnia (N = 959)	P
Headache frequency	5.7 ± 8.2	3.2 ± 5.4	0.093	3.7 ± 6.8	2.1 ± 4.9	0.004
VAS scorea	7.0 (5.0–9.0)	6.0 (5.0–7.0)	0.003	5.0 (4.0–7.0)	5.0 (3.0–6.0)	< 0.001
HIT-6 score	60.0 ± 9.5	52.3 ± 8.4	< 0.001	50.1 ± 8.6	44.4 ± 6.7	< 0.001

VAS Visual Analogue Scale, HIT-6 Headache Impact Test-6

^aVariable is analyzed by Mann–Whitney U test and shown as a median (interquartile range)