Table 2 Other characteristics of the included studies

El Barzouhi et al. [9]

2013

18–65

6–12 W

Yes

Yes

1Y

Santilli et al. [10]

2006

18–65

Less than 10 D

Yes

Yes

45D

Fan et al. [11]

2015

Unknown

Unknown

Yes

No

20D

Ahn et al. [12]

2002

19–73 (42.7)

1-10 W(median 4.5 W)

Some

Yes

3-11 M(11.9 M)

Maigne et al. [13]

1992

26–75 (45.2)

Unknown

Yes

Yes

1-48 M

Benson et al. [14]

2010

25–62 (40.4)

More than 6 W

Yes

Yes

3-42 M(13.2 M)

Komori et al. [15]

1998

20–75 (41)

2-359D(54D)

Yes

Yes

27-856D(151D)

Modic et al. [16]

1995

22–75 (49.2)

Less than 2 W

Yes

Yes

6 W-6 M

Kamanli et al. [17]

2010

(37)

Unknown

Unknown

No

4-6 W

Autio et al. [18]

2006

19–78

3–28 W

Yes

Yes

12 M

Gallucci et al. [19]

1995

27–62 (37)

Unknown

Some

Yes

6 M

Ozturk et al. [20]

2006

16–70

Less than 6 M

Some

Yes

21D

Ahn et al. [21]

2000

17–74 (39)

1–28 M

Yes

Yes

3-27 M(8.5 M)

Ilkko et al. [22]

1993

35–74 (53)

Unknown

Some

Yes

4.3–6.1Y(5.2Y)

Delauche-Cavallier et al. [23]

1992

20–64 (43)

15D-6 M(2 M)

Yes

Yes

6-27 M(12.9 M)

Buttermann et al. [24]

2002

18–70

Unknown

Yes

Yes

18 ± 10&19 ± 9 M

Bozzao et al. [25]

1992

23–65 (52)

1 M-1Y

Some

Yes

6-15 M(11 M)

Broetz et al. [26]

2008

18–65

5D-2Y(median 5 W)

Yes

No

3-7D(5D)

Jensen et al. [27]

2006

18–65 (45)

1-3 M

Yes

Yes

12 M

Henmi et al. [28]

2002

20–50

1-200D

Yes

Yes

6-12 M

Takada et al. [29]

2001

16–64 (42)

1-14 W

Yes

Yes

3-24 M(10.3 M)

Cribb et al. [30]

2007

24–73 (45)

Unknown

Yes

No

5-56 M(24 M)

Ellenberg et al. [31]

1993

28–67 (42)

Unknown

Yes

Yes

6-18 M(9.8 M)

Demirel et al. [32]

2017

50.7

Unknown

Unknown

Yes

3 M

Hong et al. [33]

2016

26–78 (50.2)

Unknown

Unknown

Yes

2-31 M(8.8 M)

Matsubara et al. [34]

1995

16–52 (36)

Unknown

Yes

Yes

3-18 M(9.7 M)

Yukawa et al. [35]

1996

14–69 (39)

Unknown

Yes

Yes

24-42 M(30 M)

Fagerlund et al. [36]

1990

14–49 (35)

6 ± 3 M

Unknown

Yes

24 M

Kesikburun et al. [37]

2019

39.7–71.5 (54.4)

4.7–7.4 M(6 M)

No

Yes

12-19 M(17 M)

Teplick et al. [38]

1985

Unknown

Unknown

Unknown

No

3 M-5Y

Shan et al. [39]

2014

20–66 (40)

2 W-6 M

Yes

Yes

6 M

Shin et al. [40]

2017

(35.8)

(2.7 M)

Yes

Yes

3Y

Komori et al. [41]

1996

18–86 (41)

0.1–8.6 M(1.8 M)

Yes

Yes

62-1208D(262D)

Saal et al. [42]

1990

Unknown

Unknown

Yes

Yes

8-77 M(25)

Bush et al. [43]

1992

17–72 (41)

1-72 M(4.2 M)

Yes

Yes

1Y

Iwabuchi et al. [44]

2010

−52

Unknown

Yes

Yes

(4.1 M)

Yu et al. [45]

2014

16–60 (38.7)

3D-10Y(16.5 M)

Yes

Yes

2-24 M

Lee et al. [46]

2017

39.08 ± 10.19

Unknown

Yes

Yes

341.38 ± 306.83D