Baseline and follow-up SF-36 scores in all treated patients compared with population norms. Baseline SF-36 surveys were obtained from 251 patients and mean scores (gray squares) were compared with age-matched US population norms (black circles). Follow-up surveys were obtained at 1 year after treatment from 104 patients (light gray triangles) and at 2 years from 84 patients (gray diamonds), and annual improvements were seen with scores on individual scales approaching or equaling population norms. Those means that are significantly (P < .05) below age-matched US population norms are underlined. The numeric mean scores and P values are provided in Table S2.