Table 3.

Results of significant independent predictors of excellent cosmetic outcome and fibrosis in Cox proportional hazard model.

Variable (only significant factors shown)	Excellent Cosmesis Hazard Ratio (95% C.I.)	p value	Fibrosis Hazard Ratio (95% C.I.)	p value
Cup Size	1.002 (0.919–1.092)	0.97	1.267 (1.049–1.532)	0.0143
Boost Method Electron vs photon	3.038 (1.312–7.033)	0.0095	0.350 (0.080–1.562)	0.1623
Use of IMRT vs conventional radiation	5.514 (4.451–6.830)	<0.0001	2.126 (1.352–3.342)	0.0011
Adjuvant Therapy		0.0308		0.2167
Chemo vs. none	1.431 (1.117–1.834)	0.0046	1.107 (0.657–1.866)	0.7027
Chemo/tam vs none	1.279 (1.018–1.608)	0.0348	1.083 (0.655–1.793)	0.7552
Tam vs none	1.102 (0.921–1.318	0.2878	1.443 (1 – 2.083)	0.05
Boost Energy			1.067 (1.025–1.112)	0.0017
12–16 vs. 6–10 MeV	0.770 (0.650–0.913)	0.0026
18–21 vs. 6–10 MeV	0.699 (0.556–0.878)	0.0021