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Table 1 Basic characteristics of the included studies

From: Eczema as a protective factor for brain cancer: a meta-analysis

Study, year

Study design

Region

Cancer

Sample size

Cases

Controls

Age range

Date range

NOS score

Ryan, 1992 [16]

Case-control

Australia

Glioma

527

110

417

25–74

1987.02–1990.03

7

Cicuttini, 1997 [17]

Case-control

Australia

Glioma

838

416

422

20–70

1987.7–1992.10

8

Schlehofer, 1999(M) [18]

Case-control

Other

Meningioma

1454

331

1123

20–80

1980–1991

6

Schlehofer, 1999(G) [18]

Case-control

Other

Glioma

3165

1178

1987

20–80

1980–1991

6

Brenner, 2002 [19]

Case-control

America

CNS tumors

1288

489

799

18–90

1994.6–1988.8

7

Schwartzbaum, 2003(G) [20]

Cohort

Europe

Glioma

14,535

NA

NA

42–81

NA

9

Schwartzbaum, 2003(M) [20]

Cohort

Europe

Meningioma

14,535

NA

NA

42–81

NA

9

Schwartzbaum, 2005 [21]

Case-control

Europe

Glioma

806

173

633

43–62

NA

8

Schoemaker, 2006 [22]

Case-control

Europe

Glioma

2681

965

1716

18–59

2000–2004

8

Schoemaker, 2007 [23]

Case-control

Europe

Meningioma

2191

475

1716

18–69

2001–2004

7

Wigertz, 2007 [24]

Case-control

Europe

CNS tumors

4836

1527

3309

≥18

2000.9–2004.2

8

Harding, 2008 [25]

Case-control

Europe

CNS tumors

6867

575

6292

2–15

1991–1996

8

Berg-Beckhoff, 2009(G) [26]

Case-control

Europe

Glioma

1098

366

732

30–69

2000.11–2003.11

8

Berg-Beckhoff, 2009(M) [26]

Case-control

Europe

Meningioma

1143

381

762

30–69

2000.11–2003.11

8

Il’yasova, 2009 [27]

Case-control

America

Glioma

565

388

177

≥18

2003.8–2008.4

7

Schoemaker, 2009 [28]

Case-control

Europe

Pituitary tumor

929

299

630

18–59

2000.12–2005.2

8

Roncarolo, 2012 [29]

Case-control

America

CNS tumors

16

6

10

0–14

1980–1999

9

Turner, 2013 [30]

Case-control

Other

Acoustic neuroma

199

34

165

30–59

2000-–004

8

Amirian, 2016 [31]

Case-control

Other

Glioma

8019

4270

3749

18–80

NA

7

Lupatsch, 2018 [32]

Case-control

Europe

CNS tumors

3188

469

2719

1–14

NA

8

Pouchieu, 2018(G) [33]

Case-control

Europe

Glioma

777

253

524

≥16

2004–2010

8

Pouchieu, 2018(M) [33]

Case-control

Europe

Meningioma

627

206

421

≥16

2004–2010

8

D’Arcy, 2019 [34]

Case-control

America

CNS tumors

1,844,575

15,205

100,000

66–99

1992–2013

7

Mansfield, 2020(U) [35]

Cohort

Europe

CNS tumors

2,711,745

NA

NA

24.9–60.7

1998.2–2016.3

8

Mansfield, 2020(D) [35]

Cohort

Europe

CNS tumors

490,618

NA

NA

1.7–21.1

1982.2–2016.6

8

  1. CNS Central nervous system, NA not mentioned, NOS Newcastle-Ottawa Scale