Interactions between migraine and tension-type headache and alcohol drinking, alcohol flushing, and hangover in Japanese

Table 4 Drinking frequency and odds ratio of migraine in comparison with tension-type headache according to alcohol flushing

	Age-adjusted OR (95% CI) in comparison with tension-type headache
	Frequency of alcohol drinking				P for trend	+1 category of drinking frequency	P for difference in OR
	None	Sometimes/1–3 days/week	4–6 days/week	Every day	P for trend	+1 category of drinking frequency	P for difference in OR
Men
Migraine
Never flushers	1 (ref.)	0.24 (0.04–1.32)	0.29 (0.05–1.62)	0.51 (0.09–2.83)	0.646	1.12 (0.70–1.80)	0.0498
Current/past flushers	1 (ref.)	0.57 (0.25–1.28)	0.26 (0.03–2.24)	0.16 (0.02–1.31)	0.022	0.55 (0.33–0.92)	0.0498
Women
Migraine
Never flushers	1 (ref.)	0.89 (0.52–1.51)	0.38 (0.16–0.88)	0.52 (0.21–1.27)	0.027	0.74 (0.56–0.97)	0.754
Current/past flushers	1 (ref.)	0.92 (0.57–1.48)	0.72 (0.21–2.48)	0.29 (0.06–1.48)	0.181	0.80 (0.57–1.11)	0.754
Both sexes
Migraine
Never flushers	1 (ref.)	0.77 (0.46–1.27)	0.42 (0.21–0.85)	0.63 (0.30–1.31)	0.060	0.80 (0.63–1.01)	0.400
Current/past flushers	1 (ref.)	0.81 (0.54–1.23)	0.56 (0.20–1.54)	0.24 (0.07–0.84)	0.013	0.71 (0.54–0.93)	0.400

ORs were calculated by the multiple logistic regression model adjusted for age (and sex)
OR odds ratio, CI confidence interval

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