Dunn 1999.

Methods	Case‐control study
Participants	448 cases/1728 controls Aged 16 to 44
Interventions	Combined oral contraception: current and none use, 2nd generation (norethisterone acetate or levonorgestrel), norethisteron acetate, levonorgestrel, 3rd generation (desogestrel or gestodene), desogestrel, gestodene
Outcomes	Myocardial infarction Events: current use 40/180, none use 386/1467, 2nd generation 20/119, levonorgestrel 18/105, norethisterone acetate 2/14, 3rd generation 20/61, desogestrel 9/37, gestodene 11/24
Notes	UK
Risk of bias
Bias	Authors' judgement	Support for judgement
Exposure ascertainment	Low risk	COC use objectively confirmed.
Outcome assessment	Low risk	COC use not objectively confirmed.
Follow‐up	Unclear risk	Not applicable as this was a case‐control study.
Source population	Low risk	Controls from the same source population as the cases.