Table 1.

Characteristics of the included studies in the meta-analysis

First author	DOP	Journal name	City	Country	Regional geography	Study design	Sample Size	Mean age (SD)	Girls (%)	Boys (%)	PICU (%)
Riphagen et al. [20]	6-May	The Lancet	London	UK	European	Case series	8	8.87 (3.68)	37.5	62.5	100
Verdoni et al. [17]	13-May	The Lancet	Bergamo	Italy	European	Retrospective	10	7.93 (3.81)	30	70	NA
Chiotos et al. [29]	28-May	J Ped Infect Dis Soc	Pennsylvania	USA	American	Case series	6	8.5 (3.83)	83.3	16.7	33.3
Grimaud et al. [30]	1-June	Ann Intensive Care	Paris	France	European	Retrospective	20	9.17 (9.26)	50	50	100
Toubiana et al. [31]	3-June	BMJ	Paris	France	European	Prospective	21	9.4 (9.56)	57	43	81
Miller et al. [32]	4-June	Gastroenterology	New York	USA	American	Retrospective	44	9.43 (14.07)	55	45	NA
Perez-Toledo et al. [33]	7-June	MedRxiv (Pre-print)	Birmingham	UK	European	Retrospective	8	10 (5.19)	37	63	NA
Whittaker et al. [34]	8-June	JAMA	London	UK	European	Retrospective	58	9.57 (6.15)	57	43	NA
Cheung et al. [7]	8-June	JAMA	New York	USA	American	Case series	17	8.6 (10.52)	53	47	88
Blondiaux et al. [35]	9-June	Radiology	Paris	France	European	Case series	4	9.25 (2.75)	75	25	100
Pouletty et al. [36]	11-June	Ann Rheum Dis	Paris	France	European	Retrospective	16	9.07 (5.78)	50	50	44
Ramcharan et al. [37]	12-June	Pediatr Cardiol	Birmingham	UK	European	Retrospective	15	8.8 (3.56)	26.7	73.3	53.3
Kaushik et al. [38]	14-June	The J of Pediatrics	New York	USA	American	Retrospective	33	9.67 (5.19)	39	61	100
Capone et al. [39]	14-June	J Pediatr	New York	USA	American	Retrospective	33	8.9 (5.26)	39	61	79
Moisan-Delaunay et al. [40]	29-June	MedRxiv (Pre-print)	Paris	France	European	Prospective	25	9.1 (4.3)	60	40	NA

All articles were published in 2020. DOP date of publication, PICU pediatric intensive care unit admission, Ref. reference number, NA not applicable