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Table 1 The baseline characteristics of included studies

From: Comparison of lung ultrasound and chest radiography for detecting pneumonia in children: a systematic review and meta-analysis

Study

Region

Study design

Sample size

Boy/girl

Age (years)

Setting

Pneumonia diagnosis

Diagnostic tool

TP

FP

FN

TN

Copetti 2008 [22]

Italy

Prospective

79

37/42

5.1

Emergency department

CXR

LUS

60

0

0

19

CXR

53

0

7

19

Iuri 2009 [23]

Italy

Prospective

28

17/11

4.5

Pediatric emergency ward

CXR

LUS

22

0

2

4

CXR

24

0

0

4

Shah 2013 [24]

USA

Prospective

200

112/88

3.0

Emergency departments

CXR

LUS

31

18

5

146

CXR

36

0

0

164

Caiulo 2013 [25]

Italy

Prospective

102

53/49

5.0

Pediatric departments

Physical and CXR

LUS

88

0

1

13

CXR

81

0

8

13

Seif 2013 [26]

Egypt

Prospective

75

36/39

Newborn

Neonatal ICU

CXR

LUS

64

4

7

0

CXR

64

0

11

0

Esposito 2014 [27]

Italy

Prospective

103

56/47

5.6

Pediatric ICU

Physical and CXR

LUS

47

3

1

52

CXR

48

0

0

55

Liu 2014 [28]

China

Prospective

80

43/37

Newborn

Neonatal ICU

Physical and CXR

LUS

40

0

0

40

CXR

40

0

0

40

Reali 2014 [29]

Italy

Prospective

107

61/46

4.0

Pediatric departments

Physical and CXR

LUS

76

1

5

25

CXR

66

2

15

24

Iorio 2015 [30]

Italy

Retrospective

52

NA

3.5

Pediatric ward

BTS guideline

LUS

28

1

1

22

CXR

25

1

4

22

Urbankowska 2015 [31]

Poland

Prospective

106

NA

4.4

Pediatric ward

Physical and CXR

LUS

71

0

5

30

CXR

76

0

0

30

Ho 2015 [32]

China

Retrospective

163

91/72

6.1

Pediatric ward

BTS guideline

LUS

147

12

4

0

CXR

151

0

12

0

Ianniello 2016 [33]

Italy

Retrospective

84

44/40

6.0

Emergency departments

Physical and CXR

LUS

60

0

1

23

CXR

47

0

14

23

Guerra 2016 [34]

Italy

Prospective

222

108/114

4.9

Pediatric departments

Clinical diagnosed

LUS

207

0

7

8

CXR

197

0

17

8

Boursiani 2017 [35]

Greece

Prospective

69

27/42

4.5

Emergency departments

Clinical and CXR

LUS

62

0

4

3

CXR

63

0

3

3

Man 2017 [36]

Romania

Retrospective

81

42/39

6.5

Emergency departments

CXR

LUS

57

15

5

4

CXR

72

0

0

9

Yadav 2017 [37]

India

Prospective

118

55/63

2.2

Emergency departments

Physical and CXR

LUS

99

6

2

11

CXR

101

0

0

17

Yilmaz 2017 [38]

Turkey

Prospective

160

NA

3.3

Emergency departments

BTS guideline

LUS

142

4

7

7

CXR

132

0

17

11

Claes 2017 [39]

Belgium

Prospective

143

77/66

3.4

Emergency departments

CXR

LUS

44

8

1

90

CXR

45

0

8

90

Samson 2018 [40]

Spain

Prospective

200

116/84

2.5

Emergency departments

Physical and CXR

LUS

74

6

11

109

CXR

85

0

0

115

Zhan 2018 [41]

Denmark

Prospective

82

47/35

1.5

Pediatric departments

CXR

LUS

33

7

49

75

CXR

41

0

0

41

Biagi 2018 [42]

Italy

Prospective

87

43/44

5.8

Pediatric departments

Physical and CXR

LUS

25

10

0

52

CXR

24

8

1

54

Lissaman 2019 [43]

Australia

Prospective

97

47/50

2.4

Emergency departments

CXR

LUS

46

17

4

30

CXR

44

0

0

17

Bloise 2021 [44]

Italy

Prospective

68

38/30

4.9

Pediatric ward

CXR

LUS

40

1

1

26

CXR

40

1

1

26

Zhu 2022 [45]

China

Prospective

60

NA

Newborn

Pediatric ward

Physical and CXR

LUS

29

2

1

28

CXR

28

0

1

1

Don 2022 [46]

Italy

Prospective

641

NA

< 16.0

Pediatric departments

CXR

LUS

575

14

26

26

CXR

533

5

68

35

Guitart 2022 [47]

Spain

Prospective

194

81/113

0.4

Pediatric ICU

BTS guideline

LUS

76

2

21

95

CXR

82

46

15

51