Table 4.

Changes of preexisting symptoms and the new-onset symptoms at the latest follow-up

	With prior surgery (n = 45), n (%)	Without prior surgery (n = 48), n (%)	P values
Patients with symptoms	42	41	0.319
Improved	20 (47.6%)	31 (75.6%)	0.009
Unchanged	10 (23.8%)	3 (7.3%)	0.012
Worse	12 (28.5%)	7 (17.1%)	0.213
New-onset symptoms	6 (13.3%)	4 (8.3%)	0.515

GKRS Gamma Knife radiosurgery. When we calculated the percentages of changes of preexisting symptoms, the number of patients with symptoms was used as denominator. Number of all patients was used as denominator when we calculated the percentages of new-onset symptoms in two groups