Table 1. Patient characteristics.

LGA, low-grade astrocytoma; HGA, high-grade astrocytoma; SCM, solitary cerebral metastasis.

Characteristic	Study Group			P Value §
	LGA (N = 77)	HGA (N = 48)	SCM (N = 29)	Overall	LGA vs. HGA	LGA vs. SCM	HGA vs. SCM
Age, years *	45.4 ± 14.8	49.3 ± 13.9	50 ± 10.8	0.141	0.116	0.100	0.765
Male, n (%)	41 (53.2%)	32 (66.7%)	18 (62.1%)	0.272	0.139	0.415	0.682
SVZ involvement, n (%)	53 (68.8%)	41 (85.4%)	7 (24.1%)	<0.001	0.037	<0.001	<0.001
Tumor volume (ml) *	25.3 ± 24.2	43.0 ± 25.7	6.1 ± 8.8	<0.001	<0.001	<0.001	<0.001

*Age and tumor volume are expressed as mean ± standard deviation; male sex and SVZ involvement are expressed as frequencies (percentages).

^§ One-way ANOVA was used to compare the differences in age across the three groups and for pairwise comparisons; the chi-square test was used to compare the overall and between-group differences in gender and SVZ involvement; the non-parametric Kruskal—Wallis test was used to compare the overall and between-group differences in tumor volume.