Multivariable associations of childhood height, weight, and body mass index with IQ score at age 7
| Mean difference (95% CI) by exposure category with adjustment for: | ||||||
|---|---|---|---|---|---|---|
| Model 1: crude | Model 2: + parental characteristics* | Model 3: + pregnancy characteristics† | Model 4: intrauterine growth‡ | Model 5: number of siblings§ | ||
| *Adjusted for social class at birth, gravidity, illegitimacy, maternal age, maternal height, maternal physical condition. †Adjusted for all covariates included in model 2 plus pregnancy induced hypertension, antepartum haemorrhage, artificial rupture of membranes, and method of delivery. ‡Adjusted for all covariates included in model 3 plus sex and gestational age standardized birth weight z scores. §Adjusted for all covariates included in model 4 plus number of siblings that the child indicated they had at the time of the 1962 survey. All exposures in these models are age and sex standardised. | ||||||
| Females | ||||||
| Height (per 1 z score) | 2.83 (2.40, 3.26) | 1.65 (1.21, 2.08) | 1.56 (1.13, 2.00) | 1.50 (1.06, 1.94) | 1.36 (0.92, 1.80) | |
| Weight (per 1 z score) | 1.64 (1.22, 2.06) | 1.01 (0.59, 1.42) | 1.01 (0.59, 1.43) | 0.88 (0.46, 1.30) | 0.80 (0.38, 1.21) | |
| Body mass index (per 1 z score) | 0.52 (0.11, 0.93) | 0.70 (0.30, 1.11) | 0.72 (0.31, 1.13) | 0.59 (0.19,1.00) | 0.51 (0.10, 0.92) | |
| Males | ||||||
| Height (per 1 z score) | 1.93 (1.53, 2.33) | 0.79 (0.39, 1.20) | 0.80 (0.40, 1.20) | 0.64 (0.25, 1.04) | 0.47 (0.07, 0.86) | |
| Weight (per 1 z score) | 0.45 (0.04, 0.87) | 0.10 (−0.32, 0.52) | 0.11 (−0.32, 0.53) | 0.05 (−0.37, 0.48) | −0.02 (−0.43, 0.40) | |
| Body mass index (per 1 z score) | −0.26 (−0.46, 0.14) | −0.10 (−0.51, 0.30) | −0.10 (−0.50, 0.30) | −0.22 (−0.61, 0.18) | −0.13 (−0.52, 0.26) | |