Are toddlers with neurosensory impairment more difficult to follow up? A secondary analysis of the hPOD follow-up study.

Varied contact strategies and long timeframes are required to achieve a high follow-up rate. Without these, the sociodemographics of children assessed would not have been representative of the entire cohort, and the rate of neurosensory impairment would have been underestimated. To maximise follow-up after randomised trials, substantial effort and resources are needed to ensure that data are useful for clinical decision-making.