Barrier/facilitator to VTE-PRO trial | TDF domain | TDF construct group | COM-B component and intervention function | IRIS component |
---|---|---|---|---|
B: Misunderstanding of study processes (i.e., coming to hospital for injections) F: Understand and are comfortable with study processes | Knowledge | Knowledge of task environment | Psychological capability – environmental restructuring/modeling Physical capability – education | Inform |
B: Fear of inability to administer heparin injection F: No fear of injection | Beliefs about capabilities | Perceived competence | Reflective motivation – training | Inform, support |
B: No direct benefits to self by participating B: Fear of complications F: Participation will further science, help others and themselves | Beliefs about consequences | Beliefs Anticipated regrets Outcome expectancies | Reflective motivation – training | Inform |
B: Forget to self-administer injection daily F: Remember to self-administer injection daily | Memory, attention and decision processes | Attention control Memory | Psychological capability – modeling; environmental restructuring | Remind |
F: Family/friend concerns about trial participation are considered, yet ultimately patients make final decision regarding participation F: Social networks facilitate motivation, support, reminders for needle injections, and assistance with injections | Social influences | Social pressure Social support | Social opportunity – education; persuasion | Involve |
B: Feelings of fear, anxiety or stress pertaining to upcoming surgery | Emotion | Fear Anxiety Stress Depression | Automatic motivation – enablement | Inform, involve, support |