Despite the success of the intervention at 20 months of age, it is uncertain whether the effect will remain in the longer term, if no further contact is maintained with participating mothers. Based on the underlying principles and rationale of this
study, anticipatory guidance could be provided to a wider age range and more children. The timing of the intervention was an important aspect, as guidance provided around the time when it is needed increases interest and adherence. The nulliparous women targeted by the study may have been more ‘susceptible’ to the information because of their inexperience in child rearing.