Behavioral Intervention Components Associated With Cost-effectiveness: A Comparison of Six Domains

Behaviour change interventions that focus on training, persuasion and restriction may be more cost-effective, as may those that encourage goal setting and comparison of behaviors with others Background To help implement behavior change interventions (BCIs) it is important to be able to characterize their key components and determine their effectiveness. Purpose This study assessed and compared the components of BCIs in terms of intervention functions identified using the Behaviour Change Wheel Framework (BCW) and in terms of their specific behavior change techniques (BCTs) identified using the BCT TaxonomyV1, across six behavioral domains and the association of these with cost-effectiveness. Methods BCIs in 251 studies targeting smoking, diet, exercise, sexual health, alcohol and multiple health behaviors, were specified in terms of their intervention functions and their BCTs, grouped into 16 categories. Associations with cost-effectiveness measured in terms of incremental cost-effectiveness ratio (ICER) upper and lower estimates were determined using regression analysis. Results The most prevalent functions were increasing knowledge through education (72.1%) and imparting skills through training (74.9%). The most prevalent BCT groupings were shaping knowledge (86.5%), changing behavioral antecedents (53.0%), supporting self-regulation (47.7%), and providing social support (44.6%). Intervention functions associated with better cost-effectiveness were those based on training (beta(low) = -15044.3; p = .002), persuasion (beta(low) = -19384.9; p = .001; beta(upp) = -25947.6; p < .001) and restriction (beta(upp) = -32286.1; p = .019), and with lower cost-effectiveness were those based on environmental restructuring (beta = 15023.9(low); p = .033). BCT groupings associated with better cost-effectiveness were goals and planning (beta(low) = -8537.3; p = .019 and beta(upp) = -12416.9; p = .037) and comparison of behavior (beta(low) = -13561.9, p = .047 and beta(upp) = -30650.2; p = .006). Those associated with lower cost-effectiveness were natural consequences (beta(low) = 7729.4; p = .033) and reward and threat (beta(low) = 20106.7; p = .004). Conclusions BCIs that focused on training, persuasion and restriction may be more cost-effective, as may those that encourage goal setting and comparison of behaviors with others.