Study covariates | Studies (patients) | OR (95% CI) | I2 (%) | Ph | Z | P |
---|---|---|---|---|---|---|
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 |