Table 2

Preunderstanding and postunderstanding by information delivery

TFIPMean difference (95% CI)
Childrenn=68n=67
 Pretest understanding of concepts†3.97 (2.7)3.76 (2.6)−0.2 (−1.1 to 0.7)
 Post-test understanding of concepts†8.85 (4.1)11.65 (4.1)2.8 (1.4 to 4.2)*
 ΔPre-post understanding of concepts†4.88 (3.4)7.84 (3.1)3.0 (1.8 to 4.1)*
 Post-test understanding of research participation‡12.39 (2.8)15.86 (2.9)3.5 (2.4 to 4.6)*
Parentsn=75n=73
 Pretest understanding of concepts†7.67 (3.9)7.90 (4.1)0.66 (−1.1 to 1.5)
 Post-test understanding of concepts†12.71 (4.0)13.34 (3.6)0.64 (−0.6 to 1.9)
 ΔPre-post understanding of concepts†5.04 (3.3)5.43 (3.5)0.39 (−0.7 to 1.5)
 Post-test understanding of research participation‡16.64 (2.4)17.36 (2.6)0.72 (−1.5 to 1.6)

  • Data are presented as mean (SD) and n (%).

  • Δ=Pre-post change in understanding.

  • *p<0.001.

  • †0–18 scale where 18=complete overall understanding.

  • ‡0–14 scale where 14=complete overall understanding.

  • IP, interactive digital program; TF, traditional paper format.