Effectiveness of a web-based SUpport PRogramme (SUPR) for communication partners of persons with hearing loss: results of a two-arm, cluster randomised controlled trial and process evaluation.

Low baseline disability (floor effect) and low intervention dose-received may explain the findings. Directly targeting CPs rather than via their PHLs and providing intervention materials specifically for CPs may improve their engagement and contribute to SUPR's value supplementary to standard HA care.