A randomized controlled trial of a tablet-based intervention to address predonation fears among high school donors.

Although the current tablet-based intervention may have some psychological benefit in that it was associated with greater donor confidence, the observed effect was small and did not translate into a lower risk for vasovagal reactions. However, greater confidence among young donors may lead to an increased willingness to donate again-a potential outcome that we will revisit among these donors as part of a planned 2-year follow-up.