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Table 2 Subgroup analysis stratified by different locations and different steel plate sites

From: The 3-dimensional miniplate is more effective than the standard miniplate for the management of mandibular fractures: a meta-analysis

Indicator

Group

Sample size

Test of association

Model

Test of heterogeneitya,b

Cases

Control

RR (95% CI)

Z

P value

Chi2

P value

I 2 (%)

Fracture regions

 Infection

Angle

127

88

0.56 [0.17, 1.89]

0.93

0.35

Fixed

3.28

0.35

8

Other

212

166

0.88 [0.42, 1.84]

0.33

0.74

Fixed

3.89

0.69

0

 Malocclusion

Angle

55

56

0.40 [0.10, 1.60]

1.30

0.20

–

–

–

–

Other

212

166

0.44 [0.23, 0.83]

2.53

0.01

Fixed

1.91

0.75

0

 Hardware failure

Angle

127

88

0.22 [0.07, 0.63]

2.82

0.005

Fixed

0.53

0.97

0

Other

133

87

0.99 [0.16, 5.99]

0.01

0.99

Fixed

1.12

0.29

11

 Nonunion/malunion

Angle

117

78

1.33 [0.14, 12.33]

0.25

0.80

–

–

–

–

Other

117

71

0.65 [0.13, 3.30]

0.52

0.60

–

–

–

–

 Wound dehiscence

Other

108

62

0.38 [0.09, 1.49]

1.39

0.16

Fixed

0.85

0.36

0

Other

108

62

0.38 [0.09, 1.49]

1.39

0.16

Fixed

0.85

0.36

0

 Paresthesia

Angle

20

20

2.00 [0.21, 18.69]

0.61

0.54

–

–

–

–

Other

167

121

0.73 [0.27, 1.99]

0.61

0.54

Fixed

0.42

0.81

0

The size of the steel plate

 Infection

4 or 6 hole

114

114

0.46 [0.18, 1.16]

1.64

0.10

Fixed

1.03

0.91

0

Other

225

140

1.30 [0.53, 3.21]

0.57

0.57

Fixed

4.81

0.44

0

 Malocclusion

4 or 6 hole

114

114

0.46 [0.23, 0.90]

2.26

0.02

Fixed

1.68

0.64

0

Other

135

108

0.37 [0.12, 1.14]

1.74

0.08

Fixed

0.03

0.86

0

 Hardware failure

4 or 6 hole

55

55

0.67 [0.11, 3.89]

0.45

0.65

Fixed

1.49

0.22

33

Other

205

120

0.23 [0.08, 0.66]

2.75

0.006

Fixed

0.60

0.96

0

 Nonunion/malunion

4 or 6 hole

39

39

–

–

–

–

–

–

–

Other

195

110

0.86 [0.24, 3.17]

0.22

0.82

Fixed

0.27

0.61

0

 Wound dehiscence

4 or 6 hole

50

50

0.14 [0.02, 1.12]

1.85

0.06

Fixed

0.00

1.00

0

Other

175

90

0.65 [0.18, 2.36]

0.65

0.51

Fixed

0.39

0.82

0

 Paresthesia

4 or 6 hole

59

59

0.83 [0.28, 2.48]

0.33

0.74

Fixed

0.02

0.88

0

Other

128

82

0.99 [0.21, 4.79]

0.01

0.99

Fixed

1.03

0.31

2

  1. RCT randomized controlled trial, PCS prospective controlled study, RCS retrospective controlled study
  2. aRandom effects model was used when the P value for heterogeneity test <0.05, otherwise the fixed effects model was used
  3. b P value <0.05 is considered statistically significant for Q statistics
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European Journal of Medical Research

ISSN: 2047-783X

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