TABLE 3.

Summary of multivariate Cox proportional hazard analyses in 175 dogs that received 3 fractions of 10 Gy SRT for sinonasal tumors.

	Kaplan‐Meier (log rank)					Cox multivariate
	Group	N	Median DSST (days)	95% CI	P‐value	Coefficient	Hazard ratio (95% CI)	P‐value
Age	Low	97	521	428‐614	0.047	0.1	1.1 (1.02‐1.18)	.01
	High	78	428	136‐308
Body weight								.06
GTV volume (cc)								.96
PTV D mean (Gy)								.08
Brain D mean (Gy)	Low	91	514	369‐659	0.014	−0.26	0.77 (0.62‐0.95)	.01
	High	84	449	377‐521
Brain D 98% (Gy)								0.2
Brain D 10% (Gy)								.14
Brain V 10Gy (%)	Low	87	592	456‐728	0.005	0.06	1.06 (1.02‐1.1)	.003
	High	88	441	376‐506
Skin D max (Gy)								.06
Eye left D 98% (Gy)								.79
Eye right D 98% (Gy)								.62
Clinical signs of nervous system after SRT	No	155	495	420‐569	0.002	Reference group		.005
	Yes	20	311	251‐371		0.8	2.2 (1.3‐4.0)

Note: Bold indicates P<0.05.