relative risk of myocardial infarction (smoking, COC)

Last reviewed 01/2018

Cigarette smoking increases the risk of myocardial infarction and stroke in women under 45 years old; the increase will be greater if the woman is also taking the combined oral contraceptive pill (COC)

  • the relative risk is increased by 10 or greater compared with non-smokers

  • relative risk in heavy smokers using COCs may be as great as 20


  • Factfile (1996). British Heart Foundation, 11/96.