Table 2.

Comparison by age at the time of volumetric analysis.

Age at volumetry (yrs)	Tumor volume (ml)*		p-value	AUC (95% CI)	Threshold (ml)
	Asymptomatic group (n = 250)	Symptomatic group (n = 83)
<65 (n = 108)	7.8 (0.3–148.0)	52.8 (2.8–180.0)	<0.001	0.875 (0.806–0.944)	21.9
65–74 (n = 114)	4.2 (0.2–117.1)	45.2 (7.9–188.9)	<0.001	0.921 (0.872–0.970)	19.0
75 ≤ (n = 111)	4.3 (0.1–63.6)	40.6 (21.1–103.3)	<0.001	0.971 (0.942–0.999)	21.1

^*Median (range).

AUC, Area under the curve; CI, confidence interval.