Raw difference¹ in Bayley III scores between 6 and 18 months of age in the four PREOBE-groups.

Data are mean ± SD. 1 The raw difference was calculated as the change in the score from 6 to 18 months. 2 P-values for overall differences between PREOBE-groups using ANOVA. Values not sharing the same suffix (abc) were significantly different in a Bonferroni post hoc test. Raw difference1 in Bayley III scores between 6 and 18 months of age in the four PREOBE-groups.