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Table 5 The association between EP and the mode of current pregnancy among women with tubal infertility or non-tubal infertility

From: Risk factors for ectopic pregnancy: a multi-center case-control study

  Tubal infertilitya Non-tubal infertilityb
  EP IUP AOR [95 % CI]d EP IUP AOR [95 % CI]d
  n c (%) n c (%) n c (%) n c (%)
ARTs applied in the current cycle of conception
 Spontaneous pregnancy 223 (68.41) 50 (68.49) Reference 55 (71.43) 22 (70.97) Reference
 IVF-ET 55 (16.87) 2 (2.74) 8.99 [1.98, 40.84] 3 (3.90) 1 (3.23) 2.52 [0.14, 44.67]
 Other ARTse 29 (8.9) 12 (16.44) 0.59 [0.25, 1.39] 17 (22.08) 6 (19.36) 0.94 [0.22, 3.98]
 Chinese herb 19 (5.83) 9 (12.33) 0.78 [0.31, 2.01] 2 (2.60) 2 (6.45) 0.35 [0.03, 4.50]
  1. EP ectopic pregnancy, IUP intrauterine pregnancy, AOR adjusted odds ratio, CI confident interval, IVF-ET in vitro fertilization and embryo transfer, ART assisted reproduction technology
  2. aThis analysis was restricted to 399 people with tubal infertility
  3. bThis analysis was restricted to 108 people with non-tubal infertility
  4. cThe sum does not necessarily equal the sample size for all variables because of missing data
  5. dOdds ratios were adjusted for age, institutions, education attainment, occupation, previous EP, serum CT IgG test, previous adnexal surgery, previous appendectomy, previous use of IUDs, previous use of other contraceptive methods and current contraceptive methods
  6. eOther ARTs includes Ovarian stimulation, intrauterine insemination, luteal phase support and combination of ovarian stimulation and luteal phase support