Proportions of use of different types of oral contraceptives over time among controls who were recent oral contraceptive users
| . | Reference year . | |||
|---|---|---|---|---|
| . | 1990–1994 . | 1995–1999 . | 2000–2004 . | 2005–2009 . |
| OC typea . | % . | % . | % . | % . |
| Low estrogen dose | 6.4 | 19.5 | 19.2 | 23.8 |
| Moderate estrogen dose | 91.5 | 81.7 | 82.8 | 78.2 |
| High estrogen dose | 6.1 | 3.6 | 0.8 | 0.4 |
| Progestin types | ||||
| Estrane progestin | 83.6 | 80.8 | 71.2 | 62.2 |
| Norethindrone | 59.7 | 44.1 | 36.5 | 30.8 |
| Norethindrone acetate | 23.3 | 34.6 | 32.3 | 28.5 |
| Ethynodiol diacetate | 3.9 | 6.8 | 5.2 | 3.5 |
| Gonane progestin | 20.3 | 22.9 | 35.6 | 36.8 |
| Levonorgestrel | 15.8 | 17.4 | 16.9 | 19.9 |
| Norgestimate | 0.0 | 3.1 | 16.7 | 13.8 |
| Norgestrel | 4.6 | 2.3 | 1.3 | 1.4 |
| Desogestrel | 0.0 | 0.5 | 1.5 | 2.5 |
| . | Reference year . | |||
|---|---|---|---|---|
| . | 1990–1994 . | 1995–1999 . | 2000–2004 . | 2005–2009 . |
| OC typea . | % . | % . | % . | % . |
| Low estrogen dose | 6.4 | 19.5 | 19.2 | 23.8 |
| Moderate estrogen dose | 91.5 | 81.7 | 82.8 | 78.2 |
| High estrogen dose | 6.1 | 3.6 | 0.8 | 0.4 |
| Progestin types | ||||
| Estrane progestin | 83.6 | 80.8 | 71.2 | 62.2 |
| Norethindrone | 59.7 | 44.1 | 36.5 | 30.8 |
| Norethindrone acetate | 23.3 | 34.6 | 32.3 | 28.5 |
| Ethynodiol diacetate | 3.9 | 6.8 | 5.2 | 3.5 |
| Gonane progestin | 20.3 | 22.9 | 35.6 | 36.8 |
| Levonorgestrel | 15.8 | 17.4 | 16.9 | 19.9 |
| Norgestimate | 0.0 | 3.1 | 16.7 | 13.8 |
| Norgestrel | 4.6 | 2.3 | 1.3 | 1.4 |
| Desogestrel | 0.0 | 0.5 | 1.5 | 2.5 |
NOTE: Percent of controls filling at least one combined oral contraceptive script among recent oral contraceptive users by reference year. Recent use is defined as filling at least one combined oral contraceptive script in the year prior.
Abbreviation: OC, oral contraceptive.
aOral contraceptive types are not mutually exclusive. Low estrogen dose = 20 μg ethinyl estradiol, moderate estrogen dose = 30–35 μg ethinyl estradiol or 50 μg mestranol, and high estrogen dose = 50 μg ethinyl estradiol or 80 μg mestranol. Estrane progestins include norethindrone, norethindrone acetate, and ethynodiol diacetate. Gonane progestins include levonorgestrel, norgestimate, norgestrel, and desogestrel.