Effectiveness of DVD vs. group-initiated diabetes prevention on information uptake for high & low health literacy participants.

The study measured immediate comprehension on a teach-back call, not weight loss, physical activity, glucose control, or diabetes onset. Participants were analysed by intervention received or chosen, not by original random assignment, so selection may have affected group differences. The DVD and class groups differed in age, and the low health literacy group was older and more likely African-American, so baseline differences may affect interpretation. The authors note that in-person class implementation fidelity may have varied. Only 442 of 481 eligible participants completed the teach-back call.

No author conflicts of interest declaration appears in the supplied text. The publication types list NIH extramural research support.

Do not conclude that the DVD alone improves diabetes prevention outcomes. Both groups received interactive voice response follow-up and teach-back calls, and the study measured immediate comprehension, not behavior change or diabetes risk. For participants with low health literacy, the DVD and class groups did not differ significantly.