Evaluation of a Web-based Decision Aid Tool for Larynx Cancer (T3/T4) Patients.

Patients diagnosed with T3/T4 laryngeal cancer in general have several treatment options available, including total laryngectomy and/or (chemo-) radition. In order to help these patients in the decision making process, MAASTRO CLINIC designed and developed a web-based decision aid tool (Treatmentchoice). The aim of this study is twofold: user-testing Treatmentchoice using a systematically development process and establish the impact of Treatmentchoice on the decision making process. The study covers 4 chronological activities: 1. assess decisional needs of patients and clinicians, 2. testing patients' and clinicians comprehensibility, acceptability and usability on the alpha-version of the tool, 3. establish the impact of Treatmentchoice on knowledge, decisional conflict and the shared decision making process, as well as the extent clinicians involve patients in decision making and 4. development of an implementation and dissemination plan for shared decision making which is based on the evaluation of barriers and facilitators for the use of patients decision aid tools in clinical practice. A mixed method will be used. It comprises structured interviews combined with think aloud and questionnaires with stakeholders involved in the whole process (patients, medical doctors, nurses, general practitioners, patient organizations, and insurance companies).