Table 4 Risk of ischemic stroke in women by migraine status and COCs use
From: Migraine in women: the role of hormones and their impact on vascular diseases
| Â | Type of contraceptive | Risk of ischemic stroke OR; 95% CI | |||
|---|---|---|---|---|---|
Women with migraine using COCs vs. women without migraine not using COCs | Women with migraine not using COCs vs. women without migraine not using COCs | Women with migraine using COCs vs. women with migraine not using COCs | Women without migraine using COCs vs. women without migraine not using COCs | ||
Collaborative Group [120]a | High dose COCs |  |  | 5.9; 2.9–12.2 | 4.9; 2.9–8.3 |
Tzourio [125] | Progestogen only High and low dose COCs | 13.9; 5.5–35.1 | 3.7; 1.5–9.1 |  | 3.5; 1.5–8.3 |
Schwartz [124] | Low dose COCs |  |  | 2.08; 1.19–3.65 | 0.88; 0.44–1.76 |
Chang [119] | High and low dose COCs | 16.9; 2.72–106 | 2.27; 0.69–7.47 |  | 2.76; 1.01–7.55 |