Table 1 Description of the included studies

Akin R [11]

8.8 ± 0.5

8.9 ± 0.6

14

11

15

11

31.9 ± 2.06

29 ± 1.8

132 ± 13.4

132 ± 3.4

Kafali G [17]

6–12

6–12

10

9

29

28

28.1 ± 8.3

27.5 ± 6.5

130 ± 10

130 ± 10

Erbayat Altay E [14]

5.5–18

7–15.5

5

10

8

14

15.5 (34.67)

20–74(37.43)

95–69(135)

112–170(142.73)

Voudris K [23]

8.1 ± 3.9

Comparable

–

–

–

–

–

–

–

–

Caksen H [15]

9.0 ± 3.1

9.8 ± 4.2

17

14

12

10

–

–

–

–

Oner N [19]

7.1 ± 3.5

7.4 ± 2.8

–

–

–

–

–

–

121 ± 22.2

123 ± 17.3

Ecevit C [16]

10.6 ± 3.2

11.5 ± 2.6

–

–

–

–

34.56 ± 8.42

40.91 ± 12.44

138 ± 12

146 ± 15

Kumandas S [18]

8.8 ± 2.0

8.9 ± 2.3

17

16

20

13

32.8 ± 11.9

31.5 ± 10.5

132.2 ± 10.7

123 ± 28.4

Babayigit A [13]

11.2 ± 4.1

13.1 ± 3.1

15

16

14

16

38.15 ± 16.89

47.98 ± 15.49

143.6 ± 22

155.7 ± 19.14

Rauchenzauner M [21]

12.4 ± 3.3

12.1 ± 3.5

38

47

28

12

–

–

–

–

Aksoy A [12]

8.4 ± 2.0

8.2 ± 1.9

25

28

31

19

27.85 ± 8.49

27.49 ± 6.42

125 ± 0.12

127 ± 0.10

Yaghini O [20]

7.4 ± 2.4

7.9 ± 2.4

–

–

–

–

–

–

–

–

Serin HM [22]

8.11 ± 3.95

7.6 ± 3.3

11

17

13

7

–

–

–

–

Hasaneen B [7]

6.2 ± 3.1

8.7 ± 3.4

13

8

41

39

–

–

–

–