Table 2

Mean difference in birth weight (kg) and weight growth rates (kg/month) in each time period between ethnic groups (Pakistani relative to white British) by sex estimated from multilevel models

Mean (SD) unadjusted growth rate for white British groupUnadjusted difference between Pakistani and white British groupsAdjusted for gestational ageAdjusted for smoking during pregnancyAdjusted for maternal heightAdjusted for all
Time periodMean difference95% CIMean difference95% CIMean difference95% CIMean difference95% CIMean difference95% CI
Boys
 Birth3.30 (0.57)−0.21(−0.29 to −0.12)−0.24(−0.31 to −0.16)−0.29(−0.38 to −0.20)−0.12(−0.20 to −0.03)−0.22(−0.30 to −0.15)
 0–4 months0.98 (0.17)−0.00(−0.03 to 0.03)−0.00(−0.03 to 0.03)0.00(−0.03 to 0.04)−0.02(−0.02 to 0.05)0.02(−0.01 to 0.06)
 4–9 months0.42 (0.12)−0.01(−0.04 to 0.01)−0.01(−0.04 to 0.02)−0.01(−0.03 to 0.02)−0.01(−0.03 to 0.02)0.01(−0.02 to 0.03)
 9–24 months0.22 (0.04)0.01(0.00 to 0.03)0.01(0.00 to 0.03)0.01(−0.00 to 0.02)0.02(0.01 to 0.03)0.02(0.01 to 0.03)
Girls
 Birth3.16 (0.52)−0.18(−0.26 to −0.10)−0.18(−0.25 to −0.11)−0.25(−0.33 to −0.17)−0.08(−0.16 to 0.01)−0.15(−0.23 to −0.08)
 0–4 months0.83 (0.17)−0.01(−0.04 to 0.02)−0.01(−0.04 to 0.02)−0.00(−0.04 to 0.03)0.01(−0.02 to 0.04)0.02(−0.02 to 0.05)
 4–9 months0.44 (0.12)−0.02(−0.04 to 0.01)−0.02(−0.04 to 0.01)−0.01(−0.04 to 0.02)−0.01(−0.04 to 0.02)0.00(−0.03 to 0.03)
 9–24 months0.22 (0.04)0.03(0.02 to 0.04)0.03(0.02 to 0.04)0.02(0.01 to 0.03)0.04(0.02 to 0.05)0.03(0.02 to 0.04)