Rotermann Michelle
Health Analysis and Modelling Division, Statistics Canada, Ottawa, Ontario, Canada.
Health Rep. 2025 Jun 18;36(6):15-26. doi: 10.25318/82-003-x202500600002-eng.
Oral contraceptives (OCs) have been legally available in Canada since 1969. OCs remain the most common method of reversible contraception in Canada and are among the most commonly used medications by reproductive-aged women in Canada. The use of OCs offers protection against unplanned pregnancy, in addition to other non-contraceptive benefits. Detailed data about current and lifetime OC use in Canada are rarely available.
Data from four cycles (from the 2007-to-2009 cycle to the 2018-to-2019 cycle) of Statistics Canada's Canadian Health Measures Survey were combined to estimate current OC use (past 30 days) by sociodemographic characteristics and other factors and formulations by estrogen dose and progestin type. Logistic regression was used to examine the association between current OC use and sociodemographic characteristics and other factors. Combined data from 2016-to-2017 and 2018-to-2019 were used to estimate lifetime OC use and use duration.
According to combined data from the 2007-to-2009 period to the 2018-to-2019 period, an average of 15.9% of non-pregnant women aged 15 to 49 had used OCs in the previous 30 days. Most (98.6%) used OCs containing estrogen and progestin, and 48.7% of them took lower-dose formulations with 10 to 25 micrograms of ethinylestradiol. Younger women aged 15 to 39 were more likely to have used OCs in the previous 30 days than those aged 40 to 49. Additionally, the adjusted odds of being an OC user were higher for women who had not had children, were non-racialized and non-Indigenous, and were currently sexually active. Another 53.9% of women aged 15 to 49 reported former use. A majority of both current (67.5%) and former (52.8%) OC users reported having used them for at least four years.
Substantial proportions of reproductive-aged women in Canada are current or former OC users.
自1969年起，口服避孕药（OCs）在加拿大可合法获取。OCs仍是加拿大最常用的可逆性避孕方法，也是加拿大育龄女性最常用的药物之一。使用OCs除了能防止意外怀孕外，还有其他非避孕益处。目前加拿大关于OCs当前使用情况和终生使用情况的详细数据很少。
将加拿大统计局加拿大健康措施调查四个周期（从2007 - 2009周期到2018 - 2019周期）的数据合并，以按社会人口学特征及其他因素估算当前OCs使用情况（过去30天内），并按雌激素剂量和孕激素类型估算配方。采用逻辑回归分析当前OCs使用情况与社会人口学特征及其他因素之间的关联。使用2016 - 2017年和2018 - 2019年的合并数据估算OCs终生使用情况和使用时长。
根据2007 - 2009年至2018 - 2019年的合并数据，在过去30天内，平均15.9%的15至49岁非孕妇使用过OCs。大多数（98.6%）使用含雌激素和孕激素的OCs，其中48.7%服用含10至25微克乙炔雌二醇的低剂量配方。15至39岁的年轻女性在过去30天内使用OCs的可能性高于40至49岁的女性。此外，未育、非种族化且非原住民、当前有性行为的女性使用OCs的校正比值更高。另有53.9%的15至49岁女性报告曾使用过OCs。当前（67.5%）和曾经（52.8%）使用OCs的女性中，大多数报告使用时间至少为四年。
加拿大相当比例的育龄女性是当前或曾经的OCs使用者。
