Patient and isPO onco-guide survey
The surveys with patients and isPO OGs were conducted as paper–pencil questionnaires sent by the isPO Trust Centre to the participants along with a consent form. The questionnaire and consent form were filled in and returned to the Trust Centre in separate envelopes. According to Dillman’s Total Design Method (Dillman The isPO OG survey was conducted 18 months after the implementation of the new form of care isPO into the care networks started. The questionnaire contained newly developed items on the training, the conditions of the voluntary work, and work satisfaction (according to the short scale on life satisfaction by Beierlein et al. (All survey questionnaires were scanned using the software Teleform to create SPSS data files. These pseudonymised data were transmitted to the evaluators for processing and analysis. The time sequence of the isPO care data collection and the surveys is shown in Fig. 