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Table 1 Results of the meta-analysis

From: Minimally invasive pancreaticoduodenectomy for periampullary disease: a comprehensive review of literature and meta-analysis of outcomes compared with open surgery

Outcomes

No. of studies

Sample size

Heterogeneity (P, I 2)

Overall effect size

95% CI of overall effect

P

MIPD

OPD

Operation time (min)

12

518

1054

<0.01, 96%

WMD = 99.4

46.0 ~ 152.8

<0.01

Blood loss (mL)

9

408

845

<0.01, 83%

WMD = −0.54

−0.88 ~ −0.20

<0.01

Transfusion

15

739

1527

0.25, 18%

RR = 0.73

0.57 ~ 0.94

0.02

Time to oral intake (days)

3

172

333

0.02, 73%

WMD = −0.86

−1.90 ~ 0.18

0.11

Hospital stay (days)

11

402

829

<0.01, 76%

WMD = −3.49

−4.83 ~ −2.15

<0.01

Overall complications

24

825

1496

<0.01, 57%

RR = 0.89

0.78 ~ 1.02

0.10

POPF

25

853

1521

0.60, 0%

RR = 0.91

0.78 ~ 1.07

0.25

Severe POPF

21

983

2169

0.80, 0%

RR = 1.04

0.86 ~ 1.27

0.68

DGE

19

720

1349

0.81, 0%

RR = 0.70

0.53 ~ 0.94

0.02

PPH

10

427

839

0.46, 0%

RR = 1.18

0.79 ~ 1.78

0.42

Reoperation

14

449

817

0.49, 0%

RR = 1.02

0.70 ~ 1.49

0.92

Readmission

9

512

1219

0.46, 0%

RR = 1.16

0.96 ~ 1.40

0.13

Mortality

21

972

2158

0.99, 0%

RR = 0.81

0.51 ~ 1.30

0.39

Retrieved lymph nodes

11

421

995

<0.01, 79%

WMD = 1.13

−0.32 ~ 2.59

0.13

R0 rate

21

582

1554

0.13, 27%

RR = 1.06

1.00 ~ 1.12

0.04