Table 2 Associations between migrant 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 | 62,366 | 532 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 27,965 | 308 | 1.29 (1.12–1.50) | 1.26 (1.09–1.47) | 1.26 (1.09–1.46) | 1.27 (1.09–1.48) |
Moderately preterm (32–36 weeks)§ | ||||||
 Norway | 64,348 | 2514 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 28,938 | 1281 | 1.14 (1.06–1.22) | 1.11 (1.03–1.19) | 1.11 (1.03–1.19) | 1.10 (1.02–1.18) |
Post-term (≥42 weeks)§ | ||||||
 Norway | 62,096 | 2994 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 27,825 | 1701 | 1.29 (1.20–1.37) | 1.21 (1.13–1.29) | 1.20 (1.13–1.29) | 1.19 (1.12–1.27) |
Small for gestational age (SGA) | ||||||
 Norway | 65,092 | 7738 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 29,401 | 3743 | 1.08 (1.03–1.13) | 1.07 (1.02–1.12) | 1.07 (1.02–1.12) | 1.05 (1.00–1.10) |
Large for gestational age (LGA) | ||||||
 Norway | 65,092 | 7847 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 29,401 | 3454 | 0.97 (0.93–1.02) | 0.97 (0.92–1.01) | 0.97 (0.93–1.02) | 0.98 (0.93–1.03) |
Apgar score < 7 at 5 min | ||||||
 Norway | 66,006 | 1418 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 30,062 | 824 | 1.28 (1.18–1.40) | 1.28 (1.17–1.40) | 1.27 (1.16–1.39) | 1.27 (1.16–1.39) |
Stillbirth | ||||||
 Norway | 66,006 | 261 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 30,062 | 157 | 1.32 (1.08–1.62) | 1.29 (1.06–1.58) | 1.29 (1.05–1.59) | 1.29 (1.05–1.58) |
Neonatal death within 28 days | ||||||
 Norway | 66,006 | 138 | 1.00 | 1.00 | 1.00 | 1.00 |
 Other | 30,062 | 63 | 1.00 (0.74–1.36) | 0.96 (0.71–1.30) | 0.96 (0.70–1.30) | 0.95 (0.69–1.30) |