Table 1.

Baseline characteristics of participants in the Women’s Health Study according to migraine status (N=25,713)^*

Characteristic	No migraine (N=21,008)	Any migraine (N=4,705)	p-value
Age, mean (SD), y	55.0 (7.2)	53.7 (6.5)	<0.0001
Body mass index, mean (SD), kg/m²	25.9 (4.9)	26.1 (5.1)	0.02
History of diabetes	2.3	1.8	0.04
History of hypertension	24.4	25.7	0.06
Physical activity
Never	37.0	38.2
<1/week	19.2	21.5
1-3/week	32.2	30.0
≥4/wk	11.7	10.3	<0.0001
Postmenopausal hormone therapy
Never	49.1	44.6
Past	9.0	9.3
Current	41.9	46.2	<0.0001
History of oral contraceptive use
No	31.2	25.0
Yes	68.4	74.4
Not sure	0.4	0.6	<0.0001
Alcohol consumption
Rarely/never	42.7	46.5
1-3 drinks/month	13.0	14.3
1-6 drinks/week	33.1	30.9
≥1 drink/day	11.2	8.4	<0.0001
Smoking status
Never	50.7	53.4
Past	37.8	35.8
Current <15 cigarettes/day	4.2	3.9
Current ≥15 cigarettes/day	7.4	7.0	0.01
Family history of MI prior to age 60 yrs
No	78.6	77.4
Yes	11.5	12.8
Unknown	10.0	9.8	0.04

data are expressed as percentages unless otherwise stated.

^†

p-values for chi-square test for categorical variables, and Wilcoxon test for continuous variables.

Proportions may not add up to 100 due to rounding or missing values.