Figure 5

Decision curves for survival time data. The thick grey line is the net benefit for a strategy of treating all men; the thick black line is the net benefit of treating no men. A thin grey line is calculated from an uncensored data set for a binary variable of survival at time t; a thin black line is calculated from the data set after censoring was introduced, using the net benefit formula for censored data. The two curves are essentially overlapping and appear as a single dark grey line.