Table 4. Crude and adjusted ORs and 95% confidence intervals for perinatal outcomes of Finnish first-time mothers according to the method of TOP.
| Perinatal outcomes | Odds Ratios and 95% Confidence Interval | |||||||
|---|---|---|---|---|---|---|---|---|
| Medical vs no TOP1 | Surgical vs no TOP1 | Surgical vs medical TOP2 | Surgical vs medical TOP, only one TOP3 | |||||
| OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | |
| Extremely preterm birth <28 weeks | ||||||||
| Crude Model | 0.91 | 0.66–1.26 | 1.30 | 1.10–1.54 | 1.43 | 0.99–2.04 | 1.32 | 0.91–1.92 |
| Adjusted Model I | 0.94 | 0.68–1.30 | 1.16 | 0.98–1.38 | 1.20 | 0.79–1.81 | 1.12 | 0.73–1.73 |
| Adjusted Model II | 1.43 | 0.90–2.30 | 1.39 | 0.84–2.30 | ||||
| Very preterm birth <32 weeks | ||||||||
| Crude Model | 0.83 | 0.64–1.08 | 1.19 | 1.04–1.37 | 1.44 | 1.07–1.92 | 1.33 | 0.98–1.80 |
| Adjusted Model I | 0.88 | 0.67–1.15 | 1.03 | 0.89–1.18 | 1.23 | 0.87–1.71 | 1.13 | 0.80–1.61 |
| Adjusted Model II | 1.24 | 0.85–1.81 | 1.23 | 0.83–1.84 | ||||
| Preterm births <37 weeks | ||||||||
| Crude Model | 0.81 | 0.74–0.89 | 1.05 | 1.00–1.10 | 1.29 | 1.17–1.43 | 1.26 | 1.13–1.40 |
| Adjusted Model I | 0.83 | 0.76–0.91 | 1.00 | 0.95–1.05 | 1.16 | 1.03–1.30 | 1.15 | 1.02–1.29 |
| Adjusted Model II | 1.19 | 1.04–1.36 | 1.18 | 1.02–1.36 | ||||
| Very low birth weight <1500 grams | ||||||||
| Crude Model | 0.87 | 0.70–1.07 | 1.15 | 1.03–1.29 | 1.33 | 1.05–1.68 | 1.25 | 0.98–1.60 |
| Adjusted Model I | 0.88 | 0.71–1.10 | 1.00 | 0.89–1.12 | 1.16 | 0.89–1.52 | 1.11 | 0.84–1.47 |
| Adjusted Model II | 1.27 | 0.93–1.73 | 1.27 | 0.91–1.76 | ||||
| Low birth weight <2500 grams | ||||||||
| Crude Model | 0.91 | 0.82–1.00 | 1.10 | 1.04–1.17 | 1.22 | 1.09–1.36 | 1.21 | 1.08–1.36 |
| Adjusted Model I | 0.86 | 0.78–0.95 | 0.98 | 0.93–1.04 | 1.16 | 1.02–1.32 | 1.16 | 1.01–1.32 |
| Adjusted Model II | 1.16 | 1.00–1.35 | 1.18 | 1.01–1.38 | ||||
| Small for gestational age | ||||||||
| Crude Model | 0.96 | 0.88–1.03 | 0.92 | 0.88–0.97 | 0.96 | 0.88–1.05 | 0.96 | 0.88–1.05 |
| Adjusted Model I | 1.05 | 0.97–1.14 | 1.07 | 1.02–1.12 | 0.99 | 0.89–1.10 | 0.99 | 0.89–1.10 |
| Adjusted Model II | 1.00 | 0.89–1.13 | 1.01 | 0.89–1.14 | ||||
| Perinatal death | ||||||||
| Crude Model | 1.03 | 0.79–1.34 | 0.83 | 0.72–0.96 | 0.81 | 0.60–1.08 | 0.81 | 0.60–1.08 |
| Adjusted Model I | 0.97 | 0.74–1.27 | 0.98 | 0.85–1.14 | 1.13 | 0.80–1.60 | 1.13 | 0.80–1.60 |
| Adjusted Model II | 1.00 | 0.67–1.48 | 1.00 | 0.67–1.48 | ||||
Adjusted Model I- adjusted for socio demographic factors; maternal age, marital status of mothers, area of residence, smoking status and year of child birth
Adjusted Model II- adjusted for number of previous TOPs, gestational age at TOP and the year of last TOP
1 No TOP group is used as reference group
2 Medical group is used as reference group
3 Medical group is used as reference group and includes mothers with only one medical and one surgical TOP