1. Adverse events.

Study ID	Intervention group		Control group
	Events	Total	Events	Total
Haematoma or haemoperitoneum
Atapour 2011	1	31	4	30
Chen 2014a	7	34	4	32
Sanchez‐Canel 2016	7	40	6	38
Al‐Hwiesh 2016	0	36	0	37
Merrikhi 2014	0	18	2	17
Ouyang 2015	3	99	2	90
Eklund 1994	0	20	0	20
Eklund 1995	0	20	0	20
Li 2009e	14	20	22	19
Rubin 1990	1	48	1	35
Scott 1994	0	30	1	59
Zhang 2016	1	103	0	49
Dialysate leak
Chen 2014a	2	34	1	32
Sanchez‐Canel 2016	9	40	7	38
Jwo 2010	7	40	6	37
Atapour 2011	1	31	1	30
Al‐Hwiesh 2016	2	36	3	37
Akcicek 1995	2	10	4	12
Akyol 1990	0	20	2	20
Eklund 1994	0	20	4	20
Eklund 1995	0	20	0	20
Nielsen 1995	1	38	0	34
Ouyang 2015	0	99	3	90
Qian 2014	0	14	1	15
Rubin 1990	6	48	3	35
Scott 1994	2	30	0	59
Stegmayr 2015	1	29	3	32
Voss 2012	4	57	10	56
Winch 2000	2	11	0	11
Wright 1999	2	21	0	24
Xie 2011a	1	40	0	40
Yip 2010	0	50	0	51
Zhang 2016	0	103	1	49
Viscus perforation
Nielsen 1995 (bladder perforation)	0	38	1	34
Al‐Hwiesh 2016 (bowel perforation)	0	36	0	37
Merrikhi 2014 (hollow viscus perforation)	0	18	0	17
Atapour 2011	0	31	0	30
Outflow failure or catheter tip migration
Atapour 2011	1	31	4	30
Li 2009e	2	20	1	19
Sanchez‐Canel 2016	12	40	25	38
Voss 2012	3	57	4	56
Al‐Hwiesh 2016	1	36	11	37
Scott 1994	1	30	2	59
Lye 1996	3	20	1	20
Qian 2014	0	14	1	15
Akcicek 1995	1	10	3	12
Winch 2000	1	11	1	11
Hernia
Chen 2014a	0	34	1	32
Jwo 2010	2	40	1	37
Sanchez‐Canel 2016	7	40	7	38
Ouyang 2015	4	99	6	90
Xie 2011a	2	40	2	40
Voss 2012	4	57	8	56
Zhang 2016	0	103	1	49