The Impact of the COVID-19 Pandemic on the Patient in Need of an Intervention

Mixed-method observational study: the impact of pandemic related changes in healthcare on quality of life and experiences with healthcare in Dutch patients undergoing surgery or another intervention during the covid pandemic (2020-2021). Phase 1: qualitative study to gain insight in relevant themes in Patient Reported Experiences Measures (PREMs) by conducting focus groups Phase 2: creating and validating a questionnaire based on themes identified in phase 1 Phase 3: questionnaire study among Dutch patients who underwent an intervention in 2020-2021 using the validated questionnaire of phase 2. The answers will be linked to data from national patients registries in surgery, cardiology, orthopedics and neurology.