Table 3 Multivariate analysis for relapse-free survival in the test set cohort of baseline prognostic factors

Grade (3 versus 1 or 2)

1.20 (0.84–1.70)

0.3

Tumor size, cm

0.03

   >2–5 versus 0–2

1.62 (1.12–2.33)

0.01

   >5 versus 0–2

1.23 (0.71–2.12)

0.5

Pathological ER status^a

0.53 (0.37–0.76)

0.0005

Lymphovascular invasion

1.32 (0.84–2.09)

0.2

Percentage of positive nodes

0.09

   >50–99 versus 0–50

1.22 (0.87–1.73)

0.3

   100 versus 0–50

1.62 (1.05–2.50)

0.03