FIGURE 3.

Time to BNI IV/V failure following second GKRS by IIIb or greater response to initial GKRS. Kaplan-Meier curves for maintenance of at least BNI IIIb pain relief after the second GKRS by pain relief after initial GKRS (BNI I-IIIb vs BNI IV-V). Patients with a good outcome (BNI I-IIIb) after the first GKRS were significantly more likely to have durable pain relief than those who did not respond to the first GKRS (BNI IV-V). BNI, Barrow Neurological Institute; GKRS, Gamma Knife radiosurgery.