2.2.3. Selecting determinants

As determinants, we used the 14 domains of the Theoretical Domains Framework (TDF) (38), because they are consistent with all known behavior change theory constructs (39) and include all key determinants form behavior theories (40–42). These domains (determinants) can be arranged under a uniform overarching model, COM-B (22), meaning that Behavior (B) is determined by the Capacity (C), Opportunity (O) and Motivation (M) for the individual or physician to perform it. The TDF-domains and their overarching COM-B components are illustrated in Supplementary Table S2. For every actor, each determinant’s contribution to WDPE problems as well as to WDPE change was worked out.