Figure 3: Overall survival nomogram. *Time interval from androgen deprivation therapy to abiraterone initiation. OS: overall survival. It needs two steps to get the 1- and 2-year overall survival probability from the nomogram above: (I) draw a line straight up to the “points” axis from the value (e.g., for hemoglobin the values are “<110g/L” and “≤110g/L”) of each risk factor (hemoglobin, liver metastasis and time from ADT to abiraterone initiation). (II) Add the point scores of each risk factor and locate the total score on the axis of “total points”. Then draw a vertical line from the total score down to the 1- or 2-year overall survival probability axes to obtain the probability.