Decision assessment tool—description of the various elements of the tentative decision tool
| Element | Description |
| Part 1—demographics and background | Demographics Questions regarding having read the information material; understanding and appreciation of the material; previous hospital experiences |
| Part 2—disease perception | Drawing reason for surgery as in ref 31 Indicate on a scale of 1–10 the severity of the reason for surgery |
| Part 3—understanding | Feeling of understanding and actual understanding, adapted from ref 27 |
| Part 4—anxiety | Adapted from ref 27; indicate on a scale of 1–10 anxiety for surgery; indicate on a scale of 1–10 whether research participation has influenced anxiety |
| Part 5—interest, satisfaction and role sharing | Adapted from ref 30; exercise to draw a pie chart indicating the role sharing in the decision-making process, and a second pie chart with the preferred sharing for a future decision; interview questions to elaborate during drawing Further questions regarding which information was used for the decision and which aspects were considered in making the decision |