Table 4

Odds ratio of low birth weight and preterm birth by ethnicity and mother's country of birth for live singleton births, England and Wales (2005–2006)

Low birth weight
EthnicityMother's country of birthUnadjustedAdjusted*
OR (95% CI)OR (95% CI)
AfricanUK1.001.00
Eastern Africa0.76 (0.66 to 0.88)0.90 (0.74 to 1.08)
Middle Africa0.96 (0.80 to 1.14)0.75 (0.59 to 0.95)
Northern Africa0.73 (0.54 to 0.98)0.96 (0.67 to 1.39)
Southern Africa0.97 (0.73 to 1.29)0.89 (0.62 to 1.28)
Western Africa0.90 (0.79 to 1.04)0.72 (0.60 to 0.87)
CaribbeanUK1.001.00
Caribbean0.78 (0.69 to 0.88)0.68 (0.57 to 0.80)
Preterm birth
EthnicityMother's country of birthUnadjustedAdjusted §
OR (95% CI)OR (95% CI)
AfricanUK1.001.00
Eastern Africa0.76 (0.65 to 0.88)0.80 (0.69 to 0.93)
Middle Africa1.08 (0.90 to 1.29)1.15 (0.96 to 1.37)
Northern Africa0.64 (0.46 to 0.88)0.65 (0.47 to 0.90)
Southern Africa0.96 (0.71 to 1.29)1.02 (0.76 to 1.38)
Western Africa1.09 (0.95 to 1.27)1.15 (0.97 to 1.30)
CaribbeanUK1.001.00
Caribbean0.96 (0.85 to 1.08)0.96 (0.85 to 1.08)
  • * Adjusted for baby's sex, gestational age and mother's age at delivery.

  • Significantly lower (p<0.05) than mothers born in the UK.

  • Excludes births occurring before 22 weeks of gestation with birth weight over 1000 g.

  • § Adjusted for baby's sex and mother's age at delivery.