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. 2015 Oct 9;112(41):693–704. doi: 10.3238/arztebl.2015.0693

Table 1. Risk factors for extrauterine pregnancy (6, 7)*.

Factors
High risk
(OR >4.0) 		Moderately elevated risk
(OR >2.0) 		Mildly elevated risk
(OR <2.0)<

  • prior tubal surgery

    adjusted OR: 4.0 (2.6–6.1); OR: 4.7–21.0

  • sterility

    adjusted OR: 2.1–2.7; OR: 2.5–21.0

  • age over 40 years

    (OR: 1.4–6.1)

  • prior extrauterine pregnancy

    (OR: 6.0–11.5)

  • current or prior ascending infection

    adjusted OR: 3.4 (2.4–5.0); OR: 2.5–3.7

  • sterilization

    (OR: 4.9–18.0)

  • cigarette smoking

    adjusted OR: 1.5 (1.1–2.2); OR: 2.3–2.5

  • use of intrauterine device

    adjusted OR: 2.4 (1.2–4.9); OR: 4.2–45.0

  • more than one sexual partner (OR: 2.1–2.5)

  • intrauterine exposure to diethylstilbestrol

    (OR: 2.4–13.0)

  • tubal pathology

    adjusted OR: 3.7 (1.2–4.8); OR: 2.5–3.5

*adjusted for prior ascending infection, cigarette smoking, educational level, and region of origin; OR, odds ratio.