Fig. 4
The influence of radiation on the patient’s prognosis. (A) The comparison of cancer-specific survival (CSS) with cancer-specific conditional survival (CS) of subgroup patients receiving radiation using conditional survival (CS) analysis. CS refers to the probability of a patient who has survived for X years surviving for another Y years, calculated as CS (Y) = S(X + Y)/S(X). (B) The influence of radiation on cancer-specific death using a competing risk model among subgroup populations. Gray’s test was used to identify any statistical differences between radiation and non- radiation due to competing risk events. Interested event: dead (attributable to this cancer); Competitive event: Dead (attributable to causes other than this cancer)