Table 1. Cox proportional-hazards regression for survival.

Eye ring redness	B	SE	Wald	df	P	Hazard ratio Exp(B)	95% CI
							Lower	Upper
Treatment			5.682	3	0.128
Eye ring redness	0.317	0.122	6.701	1	0.010	0.729	0.573	0.926
Eye ring redness*treatment			7.961	3	0.047
Eye ring redness*treatment (F)	-0.061	0.156	0.154	1	0.695	1.063	0.783	1.444
Eye ring redness*treatment (FA)	-0.129	0.167	0.594	1	0.441	1.138	0.819	1.580
Eye ring redness*treatment (T)	-0.479	0.184	6.761	1	0.009	1.615	1.125	2.318
Bill redness	B	SE	Wald	df	P	Hazard ratio Exp(B)	95% CI
							Lower	Upper
Treatment			2.985	3	0.394
Bill redness	0.205	0.068	9.142	1	0.002	8.15	0.713	0.930
Bill redness*treatment			4.851	3	0.183
Bill redness*treatment (F)	-0.065	0.090	0.523	1	0.470	1.067	0.895	1.273
Bill redness*treatment (FA)	-0.094	0.109	0.737	1	0.391	1.098	0.887	1.360
Bill redness*treatment (T)	-0.197	0.092	4.585	1	0.032	1.218	1.017	1.459

^*The relationship between trait redness and survival within flutamide (F), flutamide plus ATD (FA) or testosterone (T) groups using the same relationship in the control group as a reference.

P-values below 0.05 are shown in bold.