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Table 1: Comparison of study patient demographic data
Variables Recurrent Tumor Treatment Effect P Value
No. of male patients 19 (53.3%) 27 (61.9%) .272
No. of female patients 20 (46.7%) 25 (38.1%) 
Age (yr)^{^a} 47.4 ± 6.7 51.5 ± 8.5 .395
Mean gamma knife dose (Gy)^{^a} 17.5 ± 0.7 17.3 ± 0.5 .872
Target volume (mL)^{^a} 6.52 ± 7.01 5.97 ± 5.19 .312
Time interval between GKRS and detection of a new or enlarging, contrast-enhancing lesion (wk)^{^a} 34.7 ± 15.4 37.9 ± 17.3 .159
Time interval between GKRS and the last follow-up (wk)^{^a} 85.1 ± 22.1 89.2 ± 27.2 .576
↵a Data are means.

Variables	Recurrent Tumor	Treatment Effect	P Value
No. of male patients	19 (53.3%)	27 (61.9%)	.272
No. of female patients	20 (46.7%)	25 (38.1%)
Age (yr)^{^a}	47.4 ± 6.7	51.5 ± 8.5	.395
Mean gamma knife dose (Gy)^{^a}	17.5 ± 0.7	17.3 ± 0.5	.872
Target volume (mL)^{^a}	6.52 ± 7.01	5.97 ± 5.19	.312
Time interval between GKRS and detection of a new or enlarging, contrast-enhancing lesion (wk)^{^a}	34.7 ± 15.4	37.9 ± 17.3	.159
Time interval between GKRS and the last follow-up (wk)^{^a}	85.1 ± 22.1	89.2 ± 27.2	.576