The association between EP risk and contraceptive method used during the previous cycle.

EP, ectopic pregnancy; IUP, intrauterine pregnancy; NonP, nonpregnancy; OR, odds ratio; AOR, adjusted odds ratio; CI, confidence interval; OCPs, oral contraceptive pills; LNG-EC, levonorgestrel emergency contraception; IUD, intrauterine device.aThe sum does not necessarily equal the sample size for all variables because of missing data.bOdds ratio was adjusted for birthplace, education attainment, occupation, parity, previous ectopic pregnancy, serum Chlamydia trachomatis IgG test, previous infertility, previous adnexal surgery, and previous appendectomy.The association between EP risk and contraceptive method used during the previous cycle.