Study	Reason for exclusion
Abdel 2018	Wrong comparison: compare different technique of insertion in USPD patients
Artunc 2019	Wrong comparison: compared USPD group and another PD group initiating dialysis with CVC first then PD
Bednarova 2019	Review article
Bitencourt Dias 2017	No comparison group
Calice‐Silva 2019	Wrong comparison: USPD versus CSPD
Carsillo 2019	No comparison group
Casaretto 2012	No comparison group
Greenberg 2020	Editorial
Hdez 2012	Wrong comparison: unplanned PD instead of USPD initiation
Holm 2010	Wrong comparison: USPD versus CSPD
IDEAL‐Dialysis 2004	Wrong intervention: early versus late initiation of dialysis
Javaid 2019	Review article
Javaid 2019a	Review article
Javaid 2019b	Review article
Jiang 2019	No comparison group
Jimenez 2019	No comparison group
Kim 2018	Wrong comparison: USPD versus CSPD
Li 2017	Wrong comparison: PD group initiated dialysis emergently using HD catheter
Liu 2014	Survey, not a study
Liu 2018	Wrong comparison: APD versus CAPD in urgent‐start PD patients
Lok 2016	Review article
Machowska 2017	Wrong intervention: effect of education on the choice of dialysis in unplanned kidney failure patients
Naljayan 2018	No comparison group
Nayak 2018	Wrong comparison: USPD versus CSPD
Neumann 2018	Wrong comparison: non‐urgent start dialysis
Peng 2019	Review article
Salari 2018	Wrong comparison: USPD versus CSPD
Salari 2018a	Wrong comparison: USPD versus CSPD
Scalamogna 2019	Wrong comparison: different insertion technique in USPD
Serrano 2019	Wrong comparison: no USHD group
Shanmuganathan 2018	Wrong comparison: unplanned HD initiation versus intermittent PD
Sloan 2019	Not an urgent dialysis paper
Tannus 2017	No comparison group
Tunbridge 2019	Review article
Wang 2018	Wrong comparison: USPD versus CSPD
Wojtaszek 2018	Wrong comparison: USPD versus CSPD
Yong 2018	Non‐urgent dialysis
Zang 2019	Systemic review article

APD ‐ automated PD; CAPD ‐ continuous ambulatory PD; CSPD ‐ conventional start PD; PD ‐ peritoneal dialysis; USPD ‐ urgent‐start PD