Variable | Included in basic models*(Max N = 1278) | Excluded from basic models(Max N = 116) | p† | ||||
---|---|---|---|---|---|---|---|
N | Mean | SD | N | Mean | SD | ||
*Restricted to those with information on age, sex, birth weight, and dietary intake at each age. †p Value obtained from t tests (continuous variables) or χ^{2} tests (categorical variables). ‡Mid-parental height was calculated as the average of maternal and paternal height. | |||||||
Continuous variables | |||||||
Gestational age (weeks) | 1278 | 39.5 | 0.05 | 116 | 39.4 | 0.2 | 0.4 |
Mid-parental height (cm)‡ | 898 | 170.8 | 0.3 | 44 | 171.7 | 1.4 | 0.5 |
Categorical variables | N | % | N | % | |||
Maternal social class: % class I and II | 413 | 39.6 | 24 | 33.4 | 0.3 | ||
Paternal social class: % class I and II | 541 | 48.7 | 29 | 37.7 | 0.6 | ||
Maternal highest education: % degree | 182 | 14.7 | 11 | 12.0 | 0.5 | ||
Paternal highest education: % degree | 259 | 21.6 | 14 | 16.1 | 0.2 | ||
Birth order: % firstborn | 579 | 46.6 | 46 | 46.0 | 0.9 |