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Univariate analyses for all cases, and by intrinsic subtype, for the effect of PD-L1 expression on overall survival
| PD-L1 expression, all cases | Hazard ratio (95 % CI) | p value |
|---|---|---|
| PD-L1-positive | 4.430 (3.424–5.731) | <.0001 |
| PD-L1 expression, by intrinsic subtype | ||
| Luminal A | 2.693 (0.743–9.764) | 0.1317 |
| Luminal B (HER2−) | 3.888 (2.651–5.704) | <.0001 |
| Luminal B (HER2+) | 5.172 (2.412–11.094) | <.0001 |
| HER2 type | 2.834 (1.244–6.452) | 0.0131 |
| Basal-like | 4.973 (2.935–8.426) | <.0001 |
