Table 3 Meta-analyses of CD155 expression classified by clinicopathological parameters

Gender (male/female)

10 (1472)

0.657 (0.510–0.846)

9.4

0.355

3.26

0.001

Age (< 60/≥ 60)

3 (366)

0.778 (0.512–1.181)

0.0

0.550

1.18

0.239

Tumor size (≤ 5/> 5 cm)

4 (622)

1.141 (0.610–2.136)

46.0

0.135

0.41

0.679

TNM stage (1–2/3–4)

6 (1062)

1.829 (0.980–3.413)

73.9

0.002

1.90

0.058

Tumor stage (T1 + T2/T3 + T4)

4 (810)

1.697 (1.217–2.366)

0.0

0.819

3.12

0.002

LN metastasis (absence/presence)

8 (1209)

1.953 (1.253–3.046)

62.1

0.010

2.95

0.003

Distant metastasis (absence/presence)

4 (625)

2.253 (1.235–4.110)

22.8

0.274

2.65

0.008

Histologic grade (well + moderately differentiated/poorly differentiated)

7 (1105)

1.793 (0.871–3.692)

75.3

< 0.001

1.58

0.113