Framework of PE and OFS
PE consists of surveys at several time points. We also conducted a qualitative PE (interviews), described in a separate article (van Gelder NE, et al, unpublished data, 2023). The OFS tests the intervention in a real-world setting while gathering feasibility data that are combined with additional data from the RCT on specific feasibility measures: acceptability, demand, implementation, practicality, adaptation, integration, expansion, and limited-efficacy testing [For the OFS, the complete version of the intervention (The Web Evaluation Questionnaire data were analyzed by comparing the mean differences between the 2 RCT study arms. The log data were analyzed with descriptive statistics, and the PE data were compared to the OFS data.