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Rates of venous thrombolism per 100 000 woman years of exposure to combined oral contraceptives according to age, before and after October 1995
| Age (years) | Rate of venous thromboembolism
|
Rate ratio (95% CI) | Age adjusted ratio* (95% CI) | |
|---|---|---|---|---|
| Jan 1993-Oct 1995 | Nov 1995-Dec 1998 | |||
| 15-24 | 22.59 | 21.56 | 0.95 (0.51 to 1.79) | 0.96 (0.54 to 1.71) |
| 25-34 | 41.26 | 41.40 | 1.00 (0.67 to 1.51) | 0.99 (0.67 to 1.96) |
| 35-49 | 48.39 | 65.34 | 1.35 (0.68 to 2.75) | 1.31 (0.68 to 2.50) |
Adjusted by year of age.
