Table 1.
Age standardized baseline characteristics (1989) according to migraine status in Nurses’ Health Study II (n=115 541). Values are percentages unless stated otherwise
| Characteristics | No migraine (n=98 010) | Migraine (n=17 531) |
|---|---|---|
| Mean (SD) age*, years | 34.2 (4.7) | 35.1 (4.5) |
| Body mass index†: | ||
| <25 | 70.1 | 65.5 |
| 25 to <30 | 18.3 | 19.9 |
| ≥30 | 10.9 | 13.9 |
| History of hypertension | 4.9 | 8.6 |
| History of hypercholesterolemia | 9.7 | 14.7 |
| History of diabetes | 0.8 | 1.00 |
| Smoking status: | ||
| Never | 65.5 | 62.6 |
| Past | 21.2 | 22.3 |
| Current | 13.2 | 15.0 |
| Alcohol consumption, g/day: | ||
| 0 | 37.1 | 39.4 |
| >0 to 14.9 | 58.8 | 57.6 |
| ≥15 | 3.1 | 2.3 |
| Mean (SD) physical activity, METs/week | 24.9 (36.8) | 24.9 (36.7) |
| Menopausal status: | ||
| Premenopausal | 97.4 | 95.3 |
| Postmenopausal | 2.0 | 4.00 |
| Dubious/unknown | 0.4 | 0.5 |
| Postmenopausal hormone use: | ||
| Never | 89.2 | 83.3 |
| Past | 6.9 | 9.9 |
| Current | 3.3 | 6.1 |
| Oral contraceptive use: | ||
| Never | 17.1 | 13.4 |
| Past | 69.6 | 74.8 |
| Current | 13.2 | 11.7 |
| Family history of myocardial infarction | 14.3 | 17.5 |
| Aspirin use: | ||
| <2 days/week | 89.9 | 83.2 |
| ≥2 days/week | 10.1 | 16.8 |
| Acetaminophen (paracetamol) use: | ||
| <2 days/week | 80.0 | 66.9 |
| ≥2 days/week | 20.0 | 33.1 |
| Non-steroidal anti-inflammatory drug use: | ||
| <2 days/week | 82.6 | 69.7 |
| ≥2days/week | 17.4 | 30.3 |
Percentages may not add to a 100% because of rounding or missing values.
MET=metabolic equivalent.
*Value is not age adjusted.
†Calculated as weight in kilograms divided by height in meters squared.