borderline significancep = 0.055
The 6-year cumulative incidence of late grade 2 or higher GU toxicities was higher in the ≥ 66 Gy group than in the < 66 Gy group with borderline significance (Fig. 5 a, 14% [95% CI, 9.7–20] vs. 3.2% [95% CI, 0.6–10], p = 0.055).