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Table 1 Risk factors for ectopic pregnancy [6]

From: Suitable laparoscopic surgery in the treatment of ectopic interstitial pregnancy

Risk factor Odds ratio
High risk
Tubal surgery 21.0
Sterilisation 9.3
Previous ectopic pregnancy 8.3
In-utero exposure of diethylstilboestrol 5.3
Use of IUD 4.2–45.0
Documented tubal pathology 3.8–21.0
Moderate Risk
Infertility 2.5–21.0
Previous genital infections 2.5–3.7
Multiple sexual partners 2.1
Slight risk
Previous pelvic / abdominal surgery 0.9–3.8
Cigarette smoking 2.3–2.5
Vaginal douching 1.1–3.1
Early age of first intercourse (< 18 years) 1.6