Current systematic reviews and meta-analyses of COVID-19

Table 1 Classification of the systematic reviews

No.		Clinical presentation	Epidemiology	General	Screening and diagnosis	Severity assessment	Special populations	Treatment	Grand total
1	Mental	15	6		2	2	34	4	63
2	Gastrointestinal	33	3		6	6	9		57
3	Cardiovascular	15	3		3	7	9	2	39
4	Children	4		1	1		33		39
5	Neurology	33				1	2		36
6	Diabetes	5	2		1	8	11	2	29
7	Hydroxychloroquine							28	28
8	Technology		1		5		14	4	24
9	RAAS					5	1	15	21
10	Antiviral							20	20
11	Cancer						20		20
12	Pregnancy	1	1	1	1		16		20
13	Transmission		18						18
14	General	16		1					17
15	Smoking	1	3			3	8	1	16
16	Thrombosis	13			2	1			16
17	Obesity		1			7	6		14
18	Smell	14							14
19	Corticosteroids							13	13
20	Stroke	7	1			2	3		13
21	D-dimer				9	3			12
22	Renal	9				1	1		11
23	Lymph				6	3			9
24	Cutaneous	8							8
25	Ocular	8							8
26	Anticoagulation							7	7
27	Convalescent plasma							6	6
28	Immunosuppressive							6	6
29	Transplant						5		5
30	Hospital	1				1	2		4
31	Incubation	1	3						4
32	PPE		4						4
33	Traditional Chinese							4	4
34	Chinese							3	3
35	Older adult	2					1		3
36	Rehab						2	1	3
37	Sex		2			1			3
38	Asthma	2							2
39	Asymptomatic	2							2
40	Cytokine					2			2
41	Disinfection		2						2
42	Fatality		1				1		2
43	Fibrin				2				2
44	Guillain-Barre	2							2
45	Oral	1					1		2
46	Thrombocytopenia	2							2
47	Kawasaki	1							1
48	Multisystem inflammatory	1							1
49	Obstructive sleep apnea						1		1
50	Unclassified	27	120	14	139	62	82	155	579
	Grand Total	223	171	17	177	115	263	271	1219

RAAS: Renin-angiotensin-aldosterone system; PPE: Personal protective equipment.