Table 2.

Association between dietary potassium intake and migraine.

Variable	n. total	crude. OR 95CI	Crude. p_value	Model 1		Model 2		Model 3
Dietary Potassium
(mg/day)
Q1 (≤1771)	2,600	1 (Reference)		1 (Reference)		1 (Reference)		1 (Reference)
Q2 (1771–2,476)	2,600	0.74 (0.65 ~ 0.84)	<0.001	0.82 (0.71 ~ 0.94)	0.004	0.86 (0.75 ~ 0.99)	0.04	0.84 (0.73 ~ 0.97)	0.021
Q3 (2476–3,373)	2,543	0.73 (0.64 ~ 0.83)	<0.001	0.86 (0.75 ~ 0.99)	0.031	0.95 (0.82 ~ 1.1)	0.484	0.9 (0.77 ~ 1.06)	0.205
Q4 (≥3,373)	2,511	0.68 (0.59 ~ 0.77)	<0.001	0.85 (0.74 ~ 0.99)	0.033	0.95 (0.82 ~ 1.11)	0.535	0.87 (0.71 ~ 1.06)	0.169
Trend.test			<0.001		0.049		0.748		0.241

Q, quartiles; OR, odds ratio; CI, confidence interval. Model 1 was adjusted for age, sex, race/ethnicity. Model 2 was adjusted for sociodemographics (age, sex, race/ethnicity, education level, marital status, family income), smoking status, physical activity, hypertension, diabetes, stroke, coronary heart disease, heart failure, angina, heart attack, body mass index, and C-reactive protein. Model 3 was adjusted for sociodemographic (age, sex, race/ethnicity, education level, marital status, family income), smoking status, physical activity, hypertension, diabetes, stroke, coronary heart disease, heart failure, angina, heart attack, body mass index, C-reactive protein, energy consumption, protein consumption, carbohydrate consumption, fat consumption, sodium consumption.