Table 3.

Excess risk developing a lung cancer after breast adjuvant radiotherapy compared to no radiotherapy per cancer stage.

Stage	HR	95% CI	p value
Stage DCIS	1.658	1.237 – 2.222	<0.001
Stage T1aN0	1.256	1.111 – 1.420	<0.001
Stage T1bN0	1.224	1.131 – 1.326	<0.001
Stage T1cN0	1.155	1.131 – 1.224	<0.001
Stage IIA – T2N0	1.196	1.090 – 1.312	<0.001
Stage IIA – TxN1	1.185	1.060 – 1.324	0.003
Stage IIB	0.983	0.871 – 1.110	0.78
Stage IIIA	1.050	0.904 – 1.221	0.52
Stage IIIB	1.492	1.140 – 1.953	0.004
Stage IIIC	1.084	0.851 – 1.383	0.51