Table 5

 Body size and growth indices by social deprivation

Growth indexMost deprived quarter (n = 294), mean (SD)Less deprived three quarters (n = 1012), mean (SD)Difference (95% CI)
n = 1306 due to incomplete data on social deprivation.
Body size
    Birth weight (g)3318 (495)3421 (447)103 (43 to 162)
    Birth weight (z score)−0.19 (1.01)0.01 (0.92)0.20 (0.08 to 0.32)
    6 week weight (z score)0.00 (1.24)0.24 (1.14)0.24 (0.08 to 0.39)
    18 month weight (z score)0.29 (1.42)0.39 (1.33)0.09 (−0.08 to 0.27)
    Weight at age 7 (z score)0.24 (1.65)0.28 (1.52)−0.12 (−0.25 to 0.01)
    Height at age 7 (z score)−0.14 (1.02)0.11 (0.99)0.24 (0.11 to 0.37)
    BMI at age 7 (z score)0.13 (1.00)−0.00 (0.98)−0.13 (−0.26 to −0.00)
Change in body size (that is, weight z score)
    Birth to 6 weeks (z score)0.19 (1.15)0.23 (1.00)0.04 (−0.09 to 0.17)
    6 weeks to 18 months (z score)0.29 (1.35)0.15 (1.29)−0.15 (−0.31 to 0.02)
    Birth to 18 months (z score)0.49 (1.46)0.38 (1.36)−0.11 (−0.29 to 0.07)