Table 1 Severity of illness and outcomes of COVID-19 in included studies

Bhatraju, P K et al.

18

..

..

9

1

Bialek, S et al.

278

..

64

35

..

Burrer, S et al.^a

238

..

..

10

..

Burrer, S et al.^a

219

..

35

..

..

Catellani, F et al.

16

..

..

7

..

Chen, T (a)

55

48

24

19

36

Chen, T (b)

153

..

..

94

..

Chow, N et al.

715

..

232

..

..

Du, R-H et al.

65

..

..

17

..

Feng, Y et al.

118

45

25

18

87

Fernández-Ruiz, M et al.

15

3

..

5

6

Grasselli, G et al.

958

..

..

322

111

Grein, J et al.

18

..

..

7

..

Guan, W-J et al.

153

44

32

..

..

Kang, Y-J et al.

1825

..

..

67

..

KCDC

1679

..

..

58

..

Li, J et al.

259

135

..

65

194

Lian, J et al.

136

33

13

0

31

Liu, K et al.

18

4

..

1

17

Liu, Y et al.

85

..

..

9

76

Lodigiani, C et al.

22

..

4

7

11

Mehta, V et al.

138

..

..

49

..

Nikpouraghdam, M et al.

1164

..

..

160

..

Pereira, M R et al.

43

19

..

..

..

Richardson, S et al.^a

3368

..

..

466

959

Richardson, S et al.^a

2582

..

613

..

..

Russell, TW et al.

200

..

..

7

..

Tian, S et al.

48

20

..

2

..

Wang, D et al.

36

..

16

20

Wang, L et al.

339

239

80

65

91

Yang, R et al.

62

..

..

17

..

Yao, Q et al.

17

9

..

6

..

Yu, X et al.

107

21

..

..

..

Zhang, G et al. (a)

17

7

7

4

..

Zhang, G et al. (b)

62

24

..

..

..

Zhang, J et al.

315

246

67

19

..

Zhang, L et al.

19

11

11

..

..

Zhang, Y T et al.

312

114

36

6

..

Zhao, X-Y et al.

16

8

..

..

..