tokens: The corresponding absolute risk of VTE was 3 . 4 ( range , 3 . 1 - 3 . 8 ) per 10 000 women years among the women on COCs , 4 . 2 ( range , 3 . 2 - 5 . 2 ) per 10 000 women years among women on levonorgestrel - containing COCs , and 3 . 1 ( range , 1 . 3 - 4 . 9 ) per 10 000 women years among the women on CPA / EE .