Table 3 Multivariate logistic regression analysis of potential risk factors for OP
From: Clinical analysis of women with ovarian pregnancy: a retrospective case–control study
Adjusted OR1 (95% CI) | P1 value | Adjusted OR2 (95% CI) | P2 value | |
|---|---|---|---|---|
OP vs TP | OP vs IUP | |||
Induced abortion | ||||
0 | Ref | Ref | ||
1 | 0.44 (0.22 to 0.89) | 0.02 | 0.71 (0.35 to 1.45) | 0.34 |
2 | 0.50 (0.24 to 1.04) | 0.06 | 0.53 (0.25 to 1.13) | 0.10 |
≥ 3 | 0.68 (0.30 to 1.57) | 0.37 | 0.24 (0.25 to 1.42) | 0.60 |
Previous ectopic pregnancy | ||||
No | Ref | < 0.01 | Ref | 0.95 |
Yes | 0.32 (0.17 to 0.61) | 0.98 (0.49 to 1.95) | ||
Previous infertility | ||||
No | Ref | Ref | ||
Yes | 0.33 (0.15 to 0.71) | < 0.01 | 0.69 (0.30 to 1.57) | 0.37 |
Adnexal surgery | ||||
No | Ref | Ref | ||
Yes | 0.42 (0.23 to 0.77) | < 0.01 | 1.57 (0.78 to 3.15) | 0.20 |
Mode of pregnancy | ||||
Natural pregnancy | Ref | Ref | ||
ART | 2.08 (1.04 to 4.18) | 0.04 | 2.59 (1.25 to 5.37) | 0.01 |
Contraceptive experience | ||||
None users | Ref | Ref | ||
Intrauterine device | 2.19 (1.10 to 4.36) | 0.03 | 2.77 (1.74 to 5.71) | < 0.01 |
Oral contraceptive pills | 0.45 (0.16 to 1.22) | 0.12 | 0.78 (0.30 to 2.07) | 0.62 |
Condoms | 1.02 (0.26 to 3.94) | 0.98 | 2.13 (0.60 to 7.58) | 0.25 |