Table 2.

Comparison of patient demographic between two groups

Variables	Patients with prior surgery	Patients without prior surgery	P values
Age (range), yr	48.1 (15.2–71)	55.2 (16.6–78.7)	0.004*
Follow-up, mo	47.0 (6.6–111.6)	34.8 (6–119.4)	0.037*
Tumor volume, cm3	8.77 (1.07–29.76)	7.78 (1.15–35.46)	0.500
Margin dose, Gy	12.2 (10–15)	12.3 (10–15)	0.681
Maximum dose, Gy	25.7 (20–31.1)	25.8 (22–33.3)	0.749
With symptoms, no. (%)	42 (93.3%)	41(85.4%)	0.319

Abbreviations: yr years, mo month, no. number; *, statistical significance. Continuous variables are described as means and ranges and categorical variables are described as numbers