Outcomes and measures
Anxiety, polyp
SECONDARY, RECRUITMENT, APPENDIX
The primary outcome was the proportion of participants who had completed risk-appropriate CRC screening at 12-month follow-up. In the intervention group, the risk category was defined using the CRISP-calculated 5-year CRC risk; for the control group, it was determined by their family history in accordance with the NHMRC-endorsed guidelines that were current at the time of recruitment (Supplementary Appendix S1).CRC screening was obtained from multiple sources: self-report; GP record audit; Medicare Benefits Schedule (MBS, see Supplementary Table S1); the NBCSP; and the Victorian Admitted Episodes Dataset (VAED). In the current study self-reported data were used only where objective data from these clinical and administrative sources were unavailable.A clinical subcommittee reviewed blinded screening data for cases where there were discrepancies between data sources or to review participants with complex polyp histories (Supplementary Appendix S1).Additional measures included: demographics and clinical variables at baseline, and the following secondary outcomes:
risk perception, absolute, and comparative risk;State–Trait Anxiety Inventory (STAI) scale;cancer-specific anxiety;intentions to have CRC screening;clinical outcomes of screening tests (to be reported with 5-year follow-up); andhealthcare service utilisation and costs related to CRC screening at 12 months obtained from GP records, MBS, VAED, and NBCSP data (Supplementary Appendix S1).Participant-completed measures (a–d) were collected at baseline, 1, 6, and 12 months post-randomisation.