Table 2.

Prognostic performance of PDGFRb score group in uni- and multivariable Cox regression analysis

Endpoint	PDGFRb score group	Univariable HR (95% CI); p value	Multivariable incl. RT, grade, age group, subtype HR (95% CI); p value
IBTR, 10 years	Low	1	1
	Medium	1.51 (0.99–2.30); 0.057	1.44 (0.92–2.62); 0.111
	High	1.33 (0.87–2.02); 0.187	1.20 (0.77–1.89); 0.423
Any recurrence, 10 years	Low	1	1
	Medium	1.58 (1.11–2.23); 0.011	1.46 (1.01–2.11); 0.042
	High	1.49 (1.06–2.10); 0.021	1.32 (0.93–1.88); 0.125
BCSD, 15 years	Low	1	1
	Medium	1.37 (0.85–2.21); 0.191	1.24 (0.77–2.01); 0.381
	High	1.52 (0.96–2.38); 0.075	1.26 (0.79–2.01); 0.333

p values are based on Wald test; p values < 0.05 in bold text

IBTR ipsilateral breast tumor recurrence, BCSD breast cancer specific death, RT radiotherapy, HR hazard ratio, CI confidence interval