Skip to main content

Table 1 Baseline characteristics of included studies

From: Adjuvant radiotherapy versus observation following gross total resection for atypical meningioma: a systematic review and meta-analysis

References

Country

Design

Study period

WHO criteria

Simpson grade

No. of patients

Adjuvant RT

Observation

Condra et al. [28]

USA

R, OS, 1 institution

1964–1992

1993

1,2,3

4

21

Aghi et al. [44]

USA

R, OS, 1 institution

1993–2004

NR

1

8

100

Jo et al. [29]

Korea

R, OS, 1 institution

1997–2008

2000

1

19

13

Yu et al. [43]

China

R, OS, 1 institution

2003–2008

NR

1,2,3

47

11

Komotar et al. [9]

USA

R, OS, 1 institution

1992–2011

1993

1,2

13

32

Lee et al. [30]

USA

R, OS, 1 institution

1999–2009

2007

1,2,3

17

54

Park et al. [10]

Korea

R, OS, 1 institution

1997–2011

2000/2007

1,2,3

17

38

Aizer et al. [11]

USA

R, OS, 1 institution

1997–2011

NR

1,2,3

18

50

Sun et al. [45]

USA

R, OS, 1 institution

1993–2012

2007

1,2,3

39

112

Yoon et al. [12]

USA

R, OS, 2 institutions

2000–2010

2000

1,2,3

7

102

Wang et al. [26]

Taiwan

R, OS, 1 institution

2001–2009

2007

GTR

3

11

Jenkinson et al. [7]

UK

R, OS, 3 institutions

2001–2010

2000/2007

1,2,3

32

81

Yip et al. [32]

Taiwan

R, OS, 1 institution

2005–2014

NR

TR

7

16

Endo et al. [31]

Japan

R, OS, 1 institution

2000–2013

2007

1,2

11

19

Bagshaw et al. [13]

USA

R, OS, 1 institution

1991–2014

2007

1,2,3

12

40

Graffeo et al. [14]

USA

R, OS, 1 institution

1988–2011

2016

1,2,3

8

61

Dohm et al. [34]

USA

R, OS, 1 institution

1993–2014

2007

1,2,3

12

37

Alghamdi et al. [3]

Canada

R, OS, 1 institution

2003–2013

NR

GTR

1

43

Cho et al. [33]

Korea

R, OS, 1 institution

2003–2014

2000/2007

1,2

13

16

Shakir et al. [36]

Canada

R, OS, 1 institution

1992–2013

2007

1,2,3

12

28

Chen et al. [15]

USA

R, OS, 1 institution

1993–2014

1993/2000/2007

1,2,3

10

104

Budohoski et al. [35]

UK

R, OS, 3 institutions

2007–2014

2016

1,2,3

35

108

Zeng et al. [40]

China

R, OS, SEER data

2008–2015

2007

1,2,3

194

533

Zhi et al. [41]

USA

R, OS, 1 institution

2000–2012

2000/2007

1,2,3

26

72

Wang et al. [39]

USA

R, OS, 1 institution

2009–2018

2016

1,2,3

71

142

Lee et al. [16]

Korea

R, OS, 1 institution

2000–2013

2007

1,2,3

20

24

Ros-Sanjuan et al. [38]

Spain

R, OS, 1 institution

1994–2014

2016

1

5

5

Li et al. [37]

China

R, OS, 1 institution

2008–2015

NR

1,2

50

151

Lee et al. [42]

USA

R, OS, 1 institution

2000–2015

2000/2007

1,2,3

18

133

Jiang 2020 [27]

China

R, OS, 1 institution

2008–2016

2007

1,2

8

10

  1. R, retrospective; OS, observational study; WHO, World Health Organization; GTR, gross total resection; RT, radiotherapy; SEER, Surveillance, Epidemiology, and End Results; NR, not reported