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Table 1 Main characteristics of studies included

From: Prognostic role and clinicopathological features of SMAD4 gene mutation in colorectal cancer: a systematic review and meta-analysis

Author

Year

Country

MA (year)

TNM stage

Time of diagnosis

MF (months)

Sample size

Sequencing methods

Mut: WT

Survival endpoints

HR(e)

NOS

Sarshekeh

2017

US

52

II–IV

2000–2014

50

734

HiSeq

90:644

OS; PFS

HR

9

Mizuno

2018

US

56

IV

2005–2015

22

237

NGS

31:206

OS

RFS

HR

Curve

9

Oyanagi

2019

Japan

NR

I–IV

2009–2015

NR

201

NGS

56:145

OS

Curve

7

Liao

2019

China

NR

I–IV

2013–2017

NR

84

NGS

1:2

NR

NR

8

Fleming

2013

Australia

69

I–IV

NR

NR

744

Applied Biosystems

64:680

NR

NR

6

Stahler

2020

Germany

NR

IV

2007–2012

40·3

373

NGS

NR

OS; PFS

HR

8

Jia

2017

US

NR

NR

NR

NR

53

NR

4:49

NR

NR

6

Ando

2005

Japan

66

A–Da

NR

NR

30

NR

1:29

NR

NR

7

Miyaki

1999

Japan

NR

NR

NR

NR

61

NR

9:52

NR

NR

6

Khan

2018

US

NR

NR

2012–2016

51.6

1877

NGS

226:1599

OS

HR

7

  1. NR not report, MA mean age, MF median follow-up, Mut mutation, WT wild type, HR hazard ratio, e estimate, NGS next generation sequencing, NOS Newcastle–Ottawa scale, OS overall survival, PFS progression-free survival, RFS recurrence-free survival
  2. aDukes’stage