The association between EP risk and contraceptive method used in the current 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 age, birthplace, current address, education attainment, occupation, parity, previous ectopic pregnancy, serum Chlamydia trachomatis IgG test, previous infertility, previous adnexal surgery, previous appendectomy, and previous use of contraceptives, including condoms, withdrawal method, calendar rhythm method, OCPs, LNG-EC, tubal sterilization, and IUD.The association between EP risk and contraceptive method used in the current cycle.