Decisional Conflict of Young Cancer Patients With Regard to Fertility Preservation - Effects of an Online Decision-aid Tool

Background: Impaired fertility is often a consequence of successful cancer treatment and fertility preservation (FP) is nowadays an option for young cancer survivors. Decisions on FP, however, have to be made in the short time period after cancer diagnosis and before onset of treatment. According to previous studies the availability of helpful information is still low, decisional conflict substantial and decisions-aids would be highly desirable.

Objectives: The project aims at introducing the knowledge gained by the previous research into the development of a standardized online decision aid (DA) that complements and supports shared decision-making in fertility issues and FP for young cancer patients and their medical caretakers and to evaluate the efficacy of this DA compared with usual care. Primary objective: To show that an online decision-aid tool in addition to standard counselling reduces decisional conflict compared to standard counselling alone. Secondary objectives: 1) to assess whether the decision-aid tool decreases decisional regret significantly, 2) to assess whether the use of the decision-aid tool increases the patients' knowledge on FP and 3) to assess whether patients estimate the decision-aid tool helpful in facilitating the decision-making process.

Methods: Design: Prospective, consecutive interventional study comparing a control group with standard counselling (phase 1) with an interventional group with counselling and application of the DA (phase 2). After completing phase 1 and 2 with a sample of 40 participants, we change the study design into a randomized controlled trial and randomize 88 participants in this part of the study. Sample: A total of 120 young cancer patients followed at one of the collaborating Swiss or German cancer centers aged 16 to 40 years who are possible candidates for FP . Intervention: Online DA, which is developed based on the applicants' research findings and on a prospectively evaluated fertility-related Australian decision aid booklet. Measures: Decisional Conflict Scale (DCS); items on knowledge, attitude and willingness concerning FP; decision regret scale (DRS); items on satisfaction and helpfulness of the DA.

Procedures: The control and the interventions group completes the questionnaires at three time points, i.e. immediately after the counselling (T1), after 1 month (T2) and after 12 months (T3).

Analysis and statistics: The difference in decisional conflict between the two groups will be analyzed by using a one-way analysis of variance (ANOVA) and a propensity score weighted ANOVA to adjust for confounding variables.