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Comparison 1: Combined hormonal contraception (estrogen plus progestin) versus no hormonal contraception, Outcome 3: Venous thromboembolism
| Venous thromboembolism | |||
| Study | Event type | Total events | # using combined hormonal contraception |
| Chima 2021 | Pulmonary embolism | 6 | 1 |
| Hameed 2021 | Cerebral venous thromboembolism | 7 | 1 |
