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. Author manuscript; available in PMC: 2016 Sep 13.
Published in final edited form as: Radiother Oncol. 2016 May 27;120(1):21–27. doi: 10.1016/j.radonc.2016.05.015

Figure 4.

Figure 4

Bootstrapped (2000 replicates) feature importance measures for RFCspatial model. Whiskers show 95 percentiles (non-normal distributions). definitiveRT – definitive radiotherapy (versus post-operative radiotherapy); indChemo – induction chemotherapy; noConChemo – no concurrent chemotherapy; cisCarbo – one cycle of cisplatin followed by one cycle of carboplatin; Vx – volume of organ receiving x cGy of radiation per fraction. The feature importance of the dose metrics increases with increasing dose up to V220, which has the highest feature importance of any covariate.