Table 1 Main characteristics of studies included in this meta-analysis

0.100

<70

43 (44.3%)

54 (55.7%)

97

≥70

47 (56.6%)

36 (43.4%)

83

0.022

Negtive

77 (47.2%)

86 (52.8%)

163

Positive

13 (76.5%)

4 (23.5%)

17

0.578

Negtive

82 (49.4%)

84 (50.6%)

166

Positive

8 (57.1%)

6 (42.9%)

14

0.202

Negtive

67 (46.2%)

78 (53.8%)

145

Positive

23 (65.7%)

12 (34.3%)

35

0.880

T1

52 (50.5%)

51 (49.5%)

103

T2/T3

38 (49.4%)

39 (50.6%)

77

0.004

<4

1 (20%)

4 (80%)

5

4-10

23 (35.9)

41 (64.1%)

64

>10

66 (59.5%)

45 (40.5%)

111

<7

35 (35.4%)

64 (64.6%)

99

<0.001

7

19 (55.9%)

15 (44.1%)

34

>7

36 (76.6%)

11 (23.4%)

47

0.004

Negtive

66 (44.9%)

81 (55.1%)

147

Positive

24 (72.7%)

9 (27.3%)

33