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Table 2 Associations between migrant women’s country of first birth and adverse neonatal outcomes (1990–2016)

From: Country of first birth and neonatal outcomes in migrant and Norwegian-born parous women in Norway: a population-based study

  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)
  1. * Adjusted for year of birth, parity, maternal age and marital status
  2. † Adjusted for * and maternal education
  3. ‡ Adjusted for *, † and mother’s gross income
  4. § Weeks of gestation; term births were used as comparison group