517 / 1332
Primary Endpoint
Median Follow Up = 20 months
14% absolute difference; statistically insignificant at interim analysis
IG-IMRT 3DCRT p value
Late Grade ≥ II toxicity
(Primary Endpoint)
11.4%
25%
0.13
Late Grade ≥ III toxicity
(Exploratory Endpoint)
3.2%
17.8%
0.02
S Chopra et al; ASTRO 2015