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Table 3 Unadjusted and adjusted Odds Ratios (OR) and corresponding 95 % confidence intervals (CI) for delivery related outcomes for women treated with donated oocytes (Index group) compared to women treated with traditional IVF (Control group B)

From: Adverse obstetric outcomes in pregnancies resulting from oocyte donation: a retrospective cohort case study in Sweden

Outcome Index group n/N(%) Control group B, n/N(%) Crude OR (95 % CI) Adjusted OR (95 % CI)
Normal delivery 21/76(27.6 %)*** 39/63(61.9 %) 0.25 (0.12–0.53)*** 0.29 (0.13–0.65)**
Instrumental deliverya 13/58 (22.4 %) 12/53(22.6 %) 0.90(0.35–2.33) 0.86 (0.29–2.55)
Caesarean Section (CS) 42/76(55.3 %)*** 12/63 (19 %) 6.01 (2.65–13.59)*** 5.20 (2.21–12.22)***
Non emergency CS 18/76 (23.7 %) 10/63(15.9 %) 2.21 (0.91–5.40) 1.82 (0.71–4.66)
Emergency CSa 24/58(41.4 %)*** 2/53 (3.8 %) 16.96 (3.68–78.24)*** 15.98 (3.27–78.23)**
Induction of labora 33/58(56.9 %)*** 12/53(22.6 %) 3.19 (1.35–7.56)*** 2.80 (1.10–7.08)*
Uterine Inertia, primary-secondarya 13/58 (22.4 %)* 4/53 (7.5 %) 3.24 (0.94–11.17) 3.67 (0.92–14.66)
Hypertensive disorders of pregnancyf 12/76 (15.8 %) 6/63 (9.5 %) 2.08 (0.73–5.93) 1.66 (0.54–5.08)
Pregnancy-Induced Hypertension 2/76 (2.6 %) 0
Preeclampsia 10/76 (13.2 %) 6/63 (9.5 %) 1.44 (0.49–4.21) 1.39 (0.44–4.42)
Fetal distressa 16/58 (27.6 %)* 5/53 (9.4 %) 3.22 (1.04–9.99)* 2.86 (0.83–9.86)
Very preterm birth (<32 weeks) 3/76 (3.9 %) 0
Preterm birth (<37 weeks) 13/76 (17.1 %)* 3/63 (4.8 %) 3.94 (1.04–14.88)* 3.45 (0.88–13.62)b
Maternal Hospitalization post partum     
2 days 73/75 (97.3 %)* 54/63(85.7 %) 10.87 (1.34–90.91)* 5.26 (0.55–50.35)c
3 days 59/75(78.7 %)** 35/63(55.6 %) 3.03 (1.39–6.58)** 1.74 (0.70–4.34)c
Post-partum hemorrhage 12/76 (15.8 %) 6/63 (6.5 %) 1.47 (0.49–4.42) 3.67(1.03–13.03) d*
Retained placentae 8/34 (23.5 %) 4/51 (7.8 %) 3.83 (1.01–14.53)* 2.98 (0.73–12.18)
  1. All outcomes are adjusted for maternal age (<35, ≥35 years), BMI (<25 or ≥25 kg/m2), Nicotine Use (Yes/No), Gestational length (continuous variable, weeks), Chronic diseases (Yes/No)
  2. aExclude all non-emergency Caesarean Section (CS)
  3. bNon adjusted for gestational length but for all other covariates
  4. cAdjusted for usual covariates, CS and Hypertensive disorders
  5. dAdjusted for usual covariates and CS
  6. eExclude all CS
  7. fHypertensive disorders including preeclampsia, pregnancy induced hypertension,eclampsia or HELLP
  8. *p < 0.05
  9. **p < 0.01
  10. ***p < 0.001