Meta-analysis of patients with breast cancer based on molecular subtype
| Molecular subtype | Studies (n) | Patients (n) | Model | Pooled OR (95% CI) | P value | Heterogeneity | |
| I2 (%) | P value | ||||||
| Luminal A | 7 | 2562 | Random | 0.19 (0.11 to 0.33) | <0.00001 | 88 | <0.00001 |
| Luminal B | 7 | 1226 | 0.76 (0.56 to 1.02) | 0.06 | 42 | 0.11 | |
| HER2(+) | 9 | 529 | 3.71 (2.22 to 6.19) | <0.00001 | 81 | <0.00001 | |
| Triple-negative or basal-like type | 10 | 1115 | 4.66 (3.33 to 6.52) | <0.00001 | 63 | 0.004 | |
HER2, human epidermal growth factor receptor-2.