Risks of giving birth to an infant small for gestational age (SGA) infant in second pregnancy by change of partner between pregnancies, when excluding first and second pregnancies with pre-eclampsia
| SGA in second pregnancy | |||||
|---|---|---|---|---|---|
| OR (95% CI) | |||||
| SGA in first pregnancy | Number | Rates (%) | Crude | Adjusted* | Fully adjusted† |
| No | |||||
| Same partner | 13556 | 4 | Reference | Reference | Reference |
| Different partner | 1539 | 6.2 | 1.60 (1.52 to 1.69) | 1.44 (1.35 to 1.54) | 1.15 (1.07 to 1.24) |
| Yes | |||||
| Same partner | 9428 | 20.4 | Reference | Reference | Reference |
| Different partner | 809 | 20.1 | 0.98 (0.91 to 1.06) | 0.89 (0.81 to 0.98) | 0.75 (0.67 to 0.84) |
*Adjusted for interpregnancy interval.
†Fully adjusted model. Adjustments were made for interpregnancy interval, maternal age, early pregnancy body mass index, height and smoking habits in second pregnancy, years of involuntary childlessness before second pregnancy, mother's country of birth and years of formal education and the year of second birth.