Study ID

Country

Total sample

Study design

Mean Age (years)

Male

Female

Hospitalized

Death

Medical Staffs

Smoking history

Chen, et al. 2020 [12]

China

99

Retrospective cohort

55.5

67

32

0

11

0

0

Guan, et al. 2020 [13]

China

1099

Retrospective cohort

47

640

459

1099

15

38

158

Huang, et al. 2020 [14]

China

41

Retrospective cohort

49

30

11

0

6

0

3

Hu, et al. 2020 [15]

China

24

Retrospective cohort

38.8

8

16

0

0

0

2

Li, et al. 2020 [16]

China

83

Retrospective observational

45.5

44

39

0

0

0

0

Pung, et al. 2020 [17]

China

17

Retrospective cohort

40

7

10

0

0

0

0

Shi, et al. 2020 [18]

China

81

Retrospective cohort

49.5

42

39

0

2

0

0

Wu, et al. 2020 [19]

China

201

Cohort study

51

128

73

0

44

0

0

Yang, et al. 2020 [20]

China

52

Retrospective observational

59.7

35

17

0

32

0

2

Zhang, et al. 2020 [21]

China

140

Retrospective cohort

57

71

69

0

1

3

9

Zhou, et al. 2020 [22]

China

191

Retrospective cohort

56

119

72

0

54

0

0

Total

2028

49.9

1191

837

1099

165

41

174