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| Methods | nested case control study | |
| Participants | 2002‐2009 61 cases / 215 controls (general practioners database) age: 15‐44 y diagnosis: anticoagulation |
|
| Interventions | 2nd generation and Drospirenone | |
| Outcomes | Events during 2nd generation 44 / 233; Drospirenone 17 / 43. Adjustment for confounding: yes (matched) |
|
| Notes | UK | |
