Clinicopathological parameters | Studies (n) | Patient s (n) | OR (95% CI) | P | Heterogeneity (I2, P) | Model |
---|---|---|---|---|---|---|
Age (elderly vs. nonelderly) | 33 | 3127 | 0.983 (0.848–1.140) | 0.823 | 0.0%, 0.991 | Fixed |
Gender (female vs. male) | 28 | 2459 | 0.860 (0.726–1.018) | 0.080 | 12.6%, 0.275 | Fixed |
Tumor size (large size vs. small size) | 19 | 1811 | 1.875 (1.257–2.795) | 0.002 | 72.8%, 0.000 | Random |
Lymph node metastasis (positive vs. negative) | 26 | 2440 | 2.335 (1.606–3.395) | 0.000 | 72.7%, 0.000 | Random |
Distant metastasis (presence vs. absence) | 16 | 1514 | 2.456 (1.407–4.286) | 0.002 | 69.9%, 0.000 | Random |
Differentiation (poor vs. well, moderate) | 21 | 1980 | 1.112 (0.916–1.351) | 0.284 | 49.6%, 0.005 | Fixed |
TNM stage (III + IV vs. I + II) | 11 | 1083 | 2.034 (1.111–3.724) | 0.021 | 77.7%, 0.000 | Random |