tokens: The adjusted rate ratio of VTE for repeat users of third generation OC was 0 . 6 ( 95 % CI : 0 . 3 - 1 . 2 ) relative to repeat users of second generation pills , whereas it was 1 . 3 ( 95 % CI : 0 . 7 - 2 . 4 ) for switchers from second to third generation pills relative to switchers from third to second generation pills .