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Additional file 1.

Additional file 2: Infographic showing the content (black) and error rate (red) throughout the EFU patient questionnaire.

Additional file 3.

Additional file 2.

Additional file 1: Decision-making in kidney disease questionnaire.

Additional file 2. Additional illustrative quotations. Additional illustrative quotations by theme and subtheme.

Additional file 2. Interview topic list.

Additional file 5 Table S3. Multivariate logistic regression models for the association between donor type and post-transplant hospital readmission within 3 months: a complete case analysis (n = 1556).

Additional file 4 Table S2. Demographic and clinical characteristics between KTRs included in the analysis and the eligible KTRs from the excluded medical centre.

Additional file 3 Table S1. Demographic and clinical characteristics between kidney transplant recipients with and without missing values in the outcome (n = 1917).

Additional file 1. Additional information about the APOP screening program.

Additional file 2 Figure S2. DAG for the effect of donor type on post-transplant 3-month hospital readmission: kidney transplantation with donation after cardiac death (DCD) versus donation after brain death (DBD).

Additional file 1 Figure S1. DAG for the effect of donor type on post-transplant 3-month hospital readmission: living donor kidney transplantation versus deceased donor kidney transplantation.

Additional file 3. Consolidated Criteria for Reporting Qualitative Studies (COREQ) checklist.

Additional file 1. Semi-structured interview topic guide. Semi-structured interview topic guide (questionnaire) developed for this research and used in the focus group discussions.

Additional file 1: Fig. S1 labelling strategy for study inclusion, showing the four consecutive steps of study inclusion. Table S1. Overview of the 20 studies with mixed populations. Table S2. Quality of reporting of the 46 included studies, per individual study, as assessed with the COREQ. If a topic is mentioned in the individual study, this is marked green; if not, it is marked red. Table S3. Overview of symptoms mentioned in the included 46 articles. Using a deductive approach, symptoms were grouped into categories. In some cases, a more general term is used to describe certain symptoms for brevity, e.g. ‘appetite’ was used to describe increased or decreased appetite; ‘skin’ was used for dry, weak or brittle skin, etc.

Search string for systematic literature search for symptom questionnaires used in patients with chronic kidney disease. (DOCX 30 kb)

Table S2. Unique symptoms identified from questionnaires and interviews with patients with chronic kidney disease, divided into ten symptom clusters. (DOCX 34 kb)

Table S3. Comparison of two CKD-specific symptom questionnaires based on feedback of transplant and non-transplant patients. (DOCX 32 kb)