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156 Chapter 8 health care providers’ experiences with the DA from the trials’ intervention arm and evaluations of standard information routines and DA expectations from health care providers in the control arm. 2. METHODS 2.1 Design In the Prostate Cancer Patient Centered Care (PCPCC) trial, eighteen Dutch hospitals were enrolled in a cluster RCT to investigate patient outcomes after implementing a Pca DA in routine clinical care compared to standard care 20 . Nine hospitals were randomized to implement the DA (intervention arm) and nine hospitals provided care and information as usual (control arm). In the intervention arm, the DA was provided to patients at diagnosis and could be further consulted at home. After usage, the DA provided a summary to discuss in the subsequent consultation with the patient’s urologist. Between August 2014 and June 2016, 368 patients in the intervention arm were invited to use the DA and 136 patients were recruited for the control group to evaluate usual care. For the current study, health care providers from both arms were asked for their evaluation of routines that included either theDAor standard information practices. 2.2 Participants and procedure One hundred and eight urologists and (oncology) nurses from both trial arms were invited to fill in an online questionnaire. The questionnaires were adjusted according to trial arm; health care providers involved in the intervention arm evaluated working with the DA, health care providers in the control arm evaluated usual information routines and were asked for their expectation about working with the DA. Questionnaires were sent a year after trial start. For the intervention arm, a minimum was required of having offered a DA to at least 15 patients. If this number was not reached within a year, questionnaires were sent when this number was achieved. As the evaluation of usual information was not affected by the number of patients included in the trial, no minimum requirements were set for this group and all questionnaires were sent a year after trial start. Reminders were sent 7 and 14 days after the first invitation. 2.3 Questionnaire The questionnaire in the intervention arm focused on DA experiences and was based on the Measure Instrument for Determinants of Innovation (MIDI), a validated Dutch instrument designed to evaluate health innovations 21 . TheMIDI questionnaire consisted