In a 2-year, randomized, longitudinal, repeated measures, controlled trial in 430 at-risk young adults with SCD (50%) or SCT (50%) to compare the effects of e-Book and CHOICES interventions on knowledge and behaviors across time (baseline, immediate posttest, 6, 12, 18, 24 months). The study will provide boosters tailored to knowledge deficits at 6 and 12 months and add monthly reinforcement nudges toward concordant behavior during the first 12 mo.
The study will use web-based data collection (SCKnowIQ) and intervention delivery strategies enhanced by nudges and tailored boosters in a sample of 430 adult men and women, aged 18-35 yr with SCD or SCT, at-risk, and planning within 2 years to have a child free of SCD.