Table 1.

Baseline characteristics of participants in the Women’s Health Study according to migraine status (n=23,753) ^*

Characteristics	No migraine N=19,414	Any history of migraine N=4,339	p-value†
Age, mean (SD), y	55.0 (7.3)	53.7 (6.5)	<0.0001
Body mass index, mean (SD), kg/m2	25.9 (4.9)	26.1 (5.0)	0.015
History of hypertension	24.3	25.6	0.09
Physical activity
Never	37.1	38.1	<0.0001
<1/week	19.2	21.6
1–3/week	31.9	29.7
≥4/wk	11.8	10.6
Menopausal status
Premenopausal	27.6	27.6	<0.0001
Postmenopausal	55.4	50.0
Biologically uncertain	13.1	17.9
Unclear	3.9	4.5
Postmenopausal hormone therapy
Never	49.3	44.2	<0.0001
Past	8.8	9.3
Current	41.9	46.5
History of oral contraceptive use
No	31.5	25.1	<0.0001
Yes	68.2	74.4
Not sure	0.3	0.5
Alcohol consumption
Never	42.7	46.3	<0.0001
1–3 drinks/month	13.0	14.2
1–6 drinks/week	33.1	31.0
≥1 drink/day	11.2	8.5
Smoking status
Never	50.7	53.3	0.01
Past	37.8	35.8
Current <15 cigarettes/day	4.2	3.7
Current ≥15 cigarettes/day	7.3	7.2

^*data are expressed as percentages unless otherwise stated.

^†p-values for chi-square test for categorical variables, and t-test for continuous variables.

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