| | Name of attribute | Description | Domain range |
| | Class | Class label | Nonrecurrence and recurrence | | Age | Age in years | 10–19, 20–29, 30–39, 40–49, 50–59, 60–69, 70–79, 80–89, and 90–99 | | Menopause | Whether the patient is pre- or postmenopausal during treatment | ge40 or lt40 or premeno | | Tumor-size | Tumour size (in mm) | 0–4, 5–9, 10–14, 15–19, 20–24, 25–29, 30–34, 35–39, 40–44, 45–49, 50–54, and 55–59. | | Iny-nodes | Total axillary lymph nodes that contain metastatic breast cancer | 0–2, 3–5, 6–8, 9–11, 12–14, 15–17, 18–20, 21–23, 24–26, 27–29, 30–32, 33–35, and 36–39 | | Node-caps | If tumor penetrated in lymph node capsule | Yes or no | | Deg-malig | Histological level of the tumor | 1, 2, or 3 | | Breast | Which side of breast is affected | Right or left | | Breast-quad | Breast is partitioned into four quadrants with nipple as the center | Right-up, left-up, right-low, left-low, and central | | Irradiat | Patient’s radiation (X-rays) therapy history | Yes or no |
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