Variable | Included in complete data analysis*(Max N = 369) | Excluded from complete data analysis(Max N = 1025) | p† | ||||
---|---|---|---|---|---|---|---|
N | Mean | SD | N | Mean | SD | ||
*Restricted to those with information on diet and confounders at all four ages. †p Value obtained from t tests (continuous variables) or χ2 tests (categorical variables). ‡Mid-parental height was calculated as the average of maternal and paternal height. | |||||||
Continuous variables: | |||||||
Gestational age (weeks) | 369 | 39.5 | 0.08 | 1025 | 39.5 | 0.05 | 0.6 |
Mid-parental height (cm)‡ | 369 | 170.7 | 0.4 | 573 | 170.9 | 8.7 | 0.7 |
Categorical variables: | N | % | N | % | |||
Maternal social class: % class I and II | 155 | 42.0 | 282 | 37.9 | 0.2 | ||
Paternal social class: % class I and II | 198 | 53.7 | 372 | 45.4 | 0.01 | ||
Maternal highest education: % degree | 79 | 21.4 | 114 | 11.9 | <0.001 | ||
Paternal highest education: % degree | 102 | 27.6 | 171 | 18.6 | <0.001 | ||
Birth order: % firstborn | 193 | 52.3 | 432 | 44.4 | 0.01 |