Table 1 Variables analyzed

Benaim et al. [31]

17

17

7,2 (11,4–3)

M 7

 > 3

52,9%-24%

N/A

Borner et al. [14]

4

7

N/A

N/A

N/A

2 (50%)

 > 6

Velasquez et al. [27]

18

18

 < 18

M 10

 > 2/12 m

8(44,4%)

22

Capaccio et al. [35]

6

8

10,2 (8–13)

M 3

 ≥ 2

0 (0%)

12 (11–13)

Iordanis et al. [21]

77

77

9,6 (3,5–12)

M 47

 ≥ 2/6 m

14 (18%)

28,8 (24–47)

Kanerva et al. [15]

20

N/A

10 (3–16)

N/A

N/A

2 (10%)

70 (6–132)

Gellrich et al. [16]

15

N/A

NA

N/A

 ≥ 5/12 m

8 (53%)

36 (9–12)

Nation et al. [17]

19

N/A

9,65 (≤ 18)

N/A

 ≥ 2

5 (26%)

12–72

Berlucchi et al. [28]

23

34

7 (4–12)

M 12

 ≥ 2/12 m

15 (65,2%)

30 (6–70)

Faizal et al. [22]

22

29

10.7 (3–18)

M 14

 ≥ 2/6 m

10(45%)

6–36

Capaccio et al. [34]

32

42

7.2 (1–16)

F 19

 ≥ 2

7(22%)

23 (6–55)

Singh et al. [36]

17

26

5.6 (3–11)

F 9

 ≥ 6/12 m

7 (41,1%)

6–36

Honnet et al. [29]

5

6

6.8 (5–11)

M 4

 ≥ 2/12 m

0(0%)

9–29

Su et al. [33]

4

4

3.7(2–8)

M 3

 ≥ 2

0(0%)

 ≥ 3

Papadopoulou et al. [23]

12

12

8,2(4–16)

M 7

 ≥ 2/6 m

4 (33%)

12–48

Semensohn et al. [18]

9

13

9(3–18)

N/A

 ≥ 2/12 m

2 (22%)

16,5 (1–49)

Mikolajczak et al. [32]

9

10

7.1(3–13)

M 6

 ≥ 2

1 (11%)

15 (8–26)

Ardekian et al. [7]

50

57

N/A (2–16)

M 33

 ≥ 2/12 m

7(14%)

24 (12–48)

Schneider et al. [19]

15

21

6(2–15)

N/A

 ≥ 2

9 (60%)

12

Hackett et al. [30]

12

19

9,7 (6–16)

M 7

 ≥ 2/12 m

4 (33%)

1–24

Gary et al. [24]

3

3

9 (6–11)

M3

 ≥ 2/6 m

0 (0%)

3–16

Konstantinidis et al. [25]

6

7

9,4 (8–11)

M 3

 ≥ 2/6 m

2 (33%)

14 (12–17)

Jabbour et al. [1]

5

8

6.5 (3–8)

M 5

 ≥ 2

3 (60%)

22 (7–33)

Martins-Carvalho et al. [20]

18

18

N/A

N/A

N/A

4 (22%)

24 (4–24)

Shacham et al. [11]

70

93

6,7 (1–40)

M 43

 ≥ 2/12 m

14 (20%)

6–36

Quenin et al. [26]

10

17

5 (1,8–13)

F 6

 ≥ 2/6 m

1(10%)

11 (2–24)

Nahlieli et al. [9]

26

46

7 (2,5–13)

M 14

 ≥ 2/12 m

2 (8%)

4–36