Fig. 1

Patients’ Substance Use Severity Index (SUSI) changes from baseline to the last substance use measurement (N = 171). Legends: The figure displays the SUSI changes from baseline (left (baseline)) to the last substance use measurement (right (last)) for patients with at least two substance use measurements. Patients were divided into three SUSI levels at baseline and the last substance use measurement: low (SUSI < 0.2 (dark blue)), moderate (SUSI 0.2–0.4 (light blue)), and high (SUSI > 0.4 (orange)) substance use. The SUSI ranges from 0 to 1, where 0 indicates no substance use and 1 indicates daily substance use for all substances (cannabis, amphetamines, cocaine, opioids, benzodiazepines, and alcohol)