Table 7. Association rules analysis between breast pCR and axillary response†.
| Rule ID | Antecedent (LHS) | Consequent (RHS) | Support | Confidence | Lift |
|---|---|---|---|---|---|
| 1 | cT = T2, cN = N0, Breast pCR | Axillary pCR | 0.05 | 0.95 | 2.48 |
| 2 | cT = T2, cN = N0, Histology = Invasive Ductal, Breast pCR | Axillary pCR | 0.05 | 0.95 | 2.48 |
| 3 | cN = N0, PR = Negative, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.47 |
| 4 | cN = N0, Histology = Invasive Ductal, PR = Negative, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.47 |
| 5 | cN = N0, PR = Negative, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.46 |
| 6 | cN = N0, Breast pCR | Axillary pCR | 0.07 | 0.95 | 2.46 |
| 7 | cN = N0, PR = Negative, Surgery = Mastectomy, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.46 |
| 8 | cN = N0, Histology = Invasive Ductal, PR = Negative, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.46 |
| 9 | cN = N0, Histology = Invasive Ductal, Breast pCR | Axillary pCR | 0.07 | 0.95 | 2.46 |
| 10 | cN = N0, Histology = Invasive Ductal, PR = Negative, Surgery = Mastectomy, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.46 |
| 11 | cN = N0, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.07 | 0.95 | 2.46 |
| 12 | cN = N0, PR = Negative, CT Course ≤5, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.46 |
| 13 | cN = N0, PR = Negative, Surgery = Mastectomy, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.06 | 0.95 | 2.46 |
| 14 | cN = N0, Surgery = Mastectomy, Breast pCR | Axillary pCR | 0.07 | 0.95 | 2.46 |
| 15 | cN = N0, Histology = Invasive Ductal, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.07 | 0.95 | 2.46 |
| 16 | cN = N0, Histology = Invasive Ductal, Surgery = Mastectomy, Breast pCR | Axillary pCR | 0.07 | 0.94 | 2.46 |
| 17 | cN = N0, Histology = Invasive Ductal, PR = Negative, CT Course ≤5, Breast pCR | Axillary pCR | 0.06 | 0.94 | 2.46 |
| 18 | cN = N0, Histology = Invasive Ductal, PR = Negative, Surgery = Mastectomy, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.06 | 0.94 | 2.46 |
| 19 | cN = N0, Surgery = Mastectomy, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.07 | 0.94 | 2.45 |
| 20 | cN = N0, PR = Negative, CT Course ≤5, Regimen = Chemotherapy, Breast pCR | Axillary pCR | 0.05 | 0.94 | 2.45 |
†, top 20 rules sorted by confidence and lift. support, the frequency of one rule occurrence in the total dataset; confidence, the probability of the RHS in cases of fulfilling the LHS, thus reflecting the reliability of the inference drawn by that rule (LHS → RHS); lift, the realistic probability of co-occurrence of LHS and RHS in a rule divided by the expected probability of LHS and RHS co-occurring, assuming that both of them are independent, as a measure of significance. LHS, left-hand-side; RHS, right-hand-side; pCR, pathologic complete response; ER, estrogen receptor; PR, progesterone receptor; CT, chemotherapy. Association rules mining was conducted under the condition that the LHS for breast response was set as ‘Breast pCR’ while the RHS for axillary response was with no restriction.