Table 3 Associations between Norwegian-born women’s country of first birth and adverse neonatal outcomes (1990–2016)
| Â | n births | n cases | Crude OR | Adjusted OR | Adjusted OR | Adjusted OR |
|---|---|---|---|---|---|---|
Adverse neonatal outcomes |  |  | (95% CI) | (95% CI)* | (95% CI) †| (95% CI) ‡ |
Very preterm (22–31 weeks)§ | ||||||
 Norway | 480,589 | 3592 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 5865 | 54 | 1.23 (0.94–1.62) | 1.32 (1.01–1.74) | 1.31 (1.00–1.72) | 1.32 (1.00–1.73) |
Moderately preterm (32–36 weeks)§ | ||||||
 Norway | 495,060 | 18,063 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 6117 | 306 | 1.39 (1.22–1.58) | 1.37 (1.20–1.57) | 1.36 (1.19–1.55) | 1.36 (1.19–1.55) |
Post-term (≥42 weeks)§ | ||||||
 Norway | 480,497 | 33,033 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 5815 | 291 | 0.71 (0.63–0.81) | 1.23 (1.08–1.40) | 1.23 (1.08–1.40) | 1.23 (1.08–1.40) |
Small for gestational age (SGA) | ||||||
 Norway | 501,753 | 37,174 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 6171 | 632 | 1.43 (1.30–1.56) | 1.45 (1.33–1.59) | 1.44 (1.31–1.57) | 1.43 (1.31–1.57) |
Large for gestational age (LGA) | ||||||
 Norway | 501,753 | 95,058 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 6171 | 834 | 0.67 (0.62–0.73) | 0.73 (0.67–0.80) | 0.74 (0.68–0.80) | 0.74 (0.68–0.80) |
Apgar score < 7 at 5 min | ||||||
 Norway | 514,799 | 9279 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 6205 | 187 | 1.69 (1.46–1.97) | 1.62 (1.39–1.89) | 1.61 (1.39–1.88) | 1.61 (1.38–1.88) |
Stillbirth | ||||||
 Norway | 514,799 | 1789 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 6205 | 31 | 1.44 (1.01–2.05) | 1.69 (1.18–2.42) | 1.67 (1.17–2.40) | 1.69 (1.18–2.42) |
Neonatal death within 28 days | ||||||
 Norway | 514,799 | 808 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 6205 | 12 | 1.23 (0.70–2.18) | 1.59 (0.89–2.83) | 1.58 (0.89–2.81) | 1.59 (0.89–2.83) |