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. Author manuscript; available in PMC: 2013 Sep 25.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2010 Oct 1;81(3):623–630. doi: 10.1016/j.ijrobp.2010.06.012

Table 4.

Explained variation at 2 years using the test database

Patient Groups RPA Models
Original Model* Original Model[V+VI]* New Model[42] New Model[4]
All Studies in Test Set (RTOG 76-11, 79-03, 80-07, 84-09, 95-13, and 96-02) 20% 18% 15% 16%
Recent Studies Only (RTOG 84-09, 95-13, 96-01) 28% 19% 10% 14%
*

Modified to use the variable ‘radiation dose assigned’ as opposed to ‘radiation dose received’