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Table 2 Relative risk for the occurrence of migraine on each day of the hormone free interval compared to the pooled risk of day 8–28

From: Migraine start, course and features over the cycle of combined hormonal contraceptive users with menstrual migraine – temporal relation to bleeding and hormone withdrawal: a prospective diary-based study

 

Relative risk

Confidence interval

Day 1

2.286

0.992–5.269

Day 2

2.286

0.992–5.269

Day 3

4.000

1.850–8.648

Day 4

4.714

2.210–10.055

Day 5

4.857

2.282–10.336

Day 6

4.000

1.850–8.648

Day 7

2.857

1.276–6.396