Clinicopathological parameters | Studies (n) | Patients (n) | OR (95% CI) | p value | Heterogeneity | ||
---|---|---|---|---|---|---|---|
I2 (%) | p | Model | |||||
Differentiation grade (poorly and moderately VS well) | 2 | 252 | 0.86 (0.16–4.57) | 0.857 | 69.2% | 0.071 | Random |
Gender (male vs. female) | 2 | 252 | 1.41 (0.85–2.36) | 0.188 | 0% | 0.609 | Fixed |
Lymph node metastasis (yes vs. no) | 4 | 380 | 3.83 (2.29–6.40) | < 0.001 | 0% | 0.478 | Fixed |
Tumor stage (III–IV vs. I–II) | 3 | 326 | 1.81 (1.09–3.01) | 0.021 | 21.7% | 0.279 | Fixed |
Age (> 60vs. ≤ 60 years) | 3 | 406 | 1.93 (1.28–2.93) | 0.002 | 0% | 0.569 | Fixed |