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Rate of positive CMs by age quartile and BC subtype
| Age (years) | Luminal A n = 540 (%) | Luminal B n = 154 (%) | Luminal-HER-2 n = 132 (%) | HER-2 n = 83 (%) | TN n = 122 (%) | Pvalue |
|---|---|---|---|---|---|---|
| ≤35 (n = 110) | 18.0 | 20.0 | 0.0 | 22.2 | 0.0 | 0.204 |
| 36–50 (n = 527) | 17.8 | 40.6 | 24.7 | 42.9 | 12.2 | <0.001 |
| >50 (n = 395) | 14.5 | 18.3 | 23.4 | 42.5 | 11.8 | 0.001 |
Positive CMs include ductal carcinoma in situ and invasive carcinoma.
