TABLE 3

Univariate and Multivariate Analysis (Cox Regression Model) of Factors Associated with PFS and OS

	PFS				OS
	Univariate		Multivariate		Univariate		Multivariate
Prognostic parameter	P	Relative risk	P	Relative risk	P	Relative risk	P	Relative risk
T/NT ratio (< or ≥ 2.5)	<0.0001	17.7 (2.4–14.7)	0.0012	18.6 (3.2–109)	<0.0001	23 (6.1–86.4)	<0.0001	26.8 (5.2–139.7)
SUV (< or ≥ 4.5)	<0.0001	6.0 (2.4–14.7)	Not available		<0.0001	6.3 (2.5–15.7)	Not available
SRS	0.0012	0.23 (0.09–0.56)	0.0372	0.31 (0.01–0.93)	0.0007	0.2 (0.08–0.51)	0.11 (not significant)	0.41 (0.13–1.27)
Histologic grade	0.0007	6.9 (2.3–21.2)	Not available		<0.0001	0.1 (0.1–0.2)	Not available
Ki67 (< or ≥ 15%)	0.0008	5.6 (2.1–15.5)	0.2996 (not significant)	1.88 (0.56–6.25)	<0.0001	9.5 (4.7–80)	0.08 (not significant)	3.5 (0.8–15.2)

Data in parentheses are 95% CI.