OC use*SmokingCa/CoOR (95% CI)OR (95% CI)‡
EverNone113/4491.01.0
NeverNone60/2151.24 (0.86 to 1.77)1.26 (0.87 to 1.83)
EverAny657/5314.99 (3.93 to 6.33)5.11 (4.00 to 6.54)
NeverAny348/2436.62 (5.03 to 8.70)6.28 (4.73 to 8.34)
AP§0.21 (0.04 to 0.38)0.14 (−0.05 to 0.34)