Breast Cancer Recurrence Rate Calculator

Step 1: Enter the maximum tumor size in millimeters (mm).

Step 2: Select the tumor grade (Grade 1, 2, or 3) from the dropdown.

Step 3: Select the lymph node status (0 nodes, 1-3 nodes, or 4+ nodes).

Step 4: Click 'Calculate' to view the NPI score and the associated 10-year survival statistical groups.

The Nottingham Prognostic Index (NPI) formula is: [0.02 × Size (mm)] + Grade (1-3) + Nodes (1-3).

Node status is scored as: - 1: 0 nodes - 2: 1-3 nodes - 3: 4+ nodes

NPI Scores: - ≤ 2.4: Excellent prognosis (93% 10-yr survival) - 2.41 – 3.4: Good prognosis (80% 10-yr survival) - 3.41 – 5.4: Moderate prognosis (42-60% 10-yr survival) - > 5.4: Poor prognosis (13% 10-yr survival)