TABLE 1.
Risks of Thrombosis According to Progestin
| Progestin | Rate Ratio of Thrombosis Compared With Levonorgestrel |
|---|---|
| Levonorgestrel | 1.00 |
| Norethisterone (norethindrone) | 0.98 (0.71–1.37) |
| Norgestimate | 1.19 (0.96–1.47) |
| Drospirenone | 1.64 (1.27–2.10) |
| Desogestrel | 1.82 (1.49–2.22) |
| Gestodenea | 1.86 (1.59–2.18) |
| Cyproterone acetatea | 1.88 (1.47–2.42) |
All data are from preparations with 30 to 40 μg of estrogen.
a
Not available in the United States.
Adapted from Lidegaard O, Lokkegaard E, Svendsen AL, Agger C. BMJ. 2009;339:b2890.