Fig. 2.

Classification and regression trees predicting engagement in SUD treatment 90 days post ED discharge for Navigator trial participants randomized to LCSW (top; n = 325) or CPRS (bottom; n = 323). A round square box represents a node. Within each node, the number on the first line is the probability of engagement in SUD treatment within 90 days post-discharge. Green nodes indicate probabilities of engagement in SUD treatment <50 % (the lower the probability, the greener the node), and blue nodes indicate probabilities of engagement in SUD treatment ≥50 % (the higher the probability, the bluer the node). The text on the second line shows the sample size in that node. ^aP12M = past 12 months. ^bBaseline = ED visit.