Clinicopathological features | No. of studies | No. of patients | OR (95% CI) | p | Effects model | Heterogeneity | |
---|---|---|---|---|---|---|---|
I2 (%) | p | ||||||
LN metastasis (yes vs no) | 6 | 1966 | 1.38 (1.12–1.69) | 0.002 | Fixed | 44.6 | 0.108 |
T stage (T2–T4 vs T1) | 5 | 1805 | 1.49 (1.17–1.89) | 0.001 | Fixed | 32.7 | 0.204 |
TNM stage (II–III vs 0–I) | 5 | 1819 | 1.37 (1.07–1.77) | 0.014 | Fixed | 0 | 0.511 |
Histological grade (G3 vs G1–G2) | 4 | 779 | 3.71 (1.00–13.73) | 0.049 | Random | 91.2 | < 0.001 |
Pathological type (ILC vs IDC) | 3 | 1443 | 0.82 (0.55–1.23) | 0.345 | Fixed | 36.4 | 0.208 |
Lymphatic invasion (yes vs no) | 2 | 423 | 1.30 (0.82–2.08) | 0.266 | Fixed | 49.8 | 0.158 |