Fig. 1.

Diagram showing the reduction in the number of eligible patients when applying the inclusion and exclusion criteria (histology, stage and radical RT) and when excluding patients with missing data elements (2 year survival and tumor volume). A total of 3919 had a diagnosis of lung cancer in the source system, of these 159 were eligible for inclusion in the clinical cohort. Green indicates patients meeting the inclusion criteria or having a known data element, red patients were excluded because of an exclusion criteria. Gray indicates patients in which a criteria or data element was unknown. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)