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WHO Scientific Group Meeting on Cardiovascular Disease and Steroid Hormone Contraceptives. Reunion du Groupe scientifique OMS sur les maladies cardio-vasculaires et les contraceptifs hormonaux steroidiens.
WEEKLY EPIDEMIOLOGICAL RECORD. 1997 Nov 28; 72(48):361-3.More than 100 million women worldwide are thought to use steroid hormone contraceptive methods, with an estimated 93 million women using combined oral contraceptives (COCs). The composition and use of these contraceptive preparations, especially those of COCs, have changed dramatically over the years. The World Health Organization (WHO) convened a Scientific Group Meeting on Cardiovascular Disease and Steroid Hormone Contraception during November 3-7, 1997, to review current scientific data on the use of steroid hormone contraception as they relate to the risk of myocardial infarction, ischemic and hemorrhagic stroke, and venous thromboembolic disease. The group also reviewed the incidence of cardiovascular disease among women of reproductive age in general, how the effect of risk factors for cardiovascular disease may be changed using hormonal contraceptives, and whether different compositions of COCs have different cardiovascular risk profiles. The group was comprised of the authors of background papers prepared for the meeting and experts from around the world. The scientific group's conclusions are presented. The incidence and mortality rates of all cardiovascular diseases are very low among reproductive-age women. For women who do not smoke, who have their blood pressure checked, and who do not have hypertension or diabetes, the risk of myocardial infarction in COC users is not increased regardless of age. While current users of COCs have a low absolute risk of venous thromboembolism, their risk is still 3-6 times greater than that of nonusers, with the risk probably being highest during the first year of use.