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Table 4 Results of the meta-analysis

From: Comparison of efficacy of robotic surgery, laparoscopy, and laparotomy in the treatment of ovarian cancer: a meta-analysis

Variable

Sample size

Test of association

Model

Test of heterogeneitya,b

Egger’s testc

N1

N2

WMD/OR (95% CI)

Z

P

Q

P

I2 (%)

t

P

R vs. L

           

EBL

96

79

− 55.0871 [− 139.0087; 28.8345]

1.29

0.1983

R

8.83

0.07

54.7

0.3887

0.7234

LHS

96

79

− 1.4296[− 3.5326; 0.6734]

1.33

0.1827

R

13.06

0.01

69.4

0.9334

0.4195

OT

104

90

− 0.8561[− 46.3735; 44.6612]

0.04

0.9706

R

13.4

< 0.01

70.2

0.7602

0.5024

PC

144

166

1.4541 [0.6502; 3.2516]

0.91

0.3619

F

5.34

0.38

6.3

1.5330

0.2001

PN

78

58

− 0.5664 [− 3.1615; 2.0288]

0.43

0.6688

F

2.78

0.25

28.2

0.7882

0.5751

PR

26

32

0.2387 [0.0445; 1.2792]

1.67

0.0944

F

1.34

0.25

25.5

NA

NA

OS rate

60

44

2.2000 [0.0842; 57.4835]

0.47

0.6360

NA

NA

NA

NA

NA

NA

DFS rate

60

44

1.6909 [0.2572; 11.1175]

0.55

0.5850

F

0.05

0.83

0.0

NA

NA

R vs. O

           

EBL

125

274

− 521.7027 [− 809.7816; − 233.6238]

3.55

0.0004

R

82.54

< 0.01

93.9

1.1403

0.3178

LHS

159

274

− 5.2225 [− 6.1485; − 4.2965]

11.05

< 0.0001

F

8.36

0.14

40.2

0.1786

0.8669

OT

151

259

9.8527 [− 57.0904; 76.7958]

0.29

0.7730

R

59.75

< 0.01

93.3

0.5645

0.6119

PC

159

274

0.4710 [0.2537; 0.8747]

2.38

0.0171

F

1.77

0.88

0.0

6.8290

0.0024

PN

141

226

0.0048 [− 1.9418; 1.9514]

<0.01

0.9962

F

4.77

0.19

37.1

0.2131

0.8510

PR

73

59

0.8506 [0.3356; 2.1562]

0.34

0.7332

F

1.71

0.19

41.7

NA

NA

OS rate

107

99

6.4355 [1.6722; 24.7678]

2.71

0.0070

F

0.09

0.76

0.0

NA

NA

  1. WMD weighted mean difference, OR odds ratio, CI confidence interval, EBL estimated blood loss, LHS length of hospital stay, OT operating time, PC postoperative complication, PN pelvic nodes, PR postoperative recurrence, OS overall survival, DFS disease-free survival, NA data are not available
  2. aRandom effects model was used when the P for heterogeneity test < 0.05; otherwise, the fixed effect model was used
  3. bP < 0.05 is considered statistically significant for Q test
  4. cEgger’s test to evaluate publication bias, P < 0.05 is considered statistically significant