Fig. 1
From: External validation of an opioid misuse machine learning classifier in hospitalized adult patients
Patient hospital encounter flow chart during study period. Unplanned admissions were defined using the Center for Medicare and Medicaid Services. Single question screen was performed by the nurse with the following: ““How many times in the past year have you used an illegal drug or used a prescription medication for non-medical reasons? (> 1 is positive)”. DAST = drug abuse screening tool; Zone 1 = DAST score 0; Zone 2 = DAST score 1; Zone 3 = DAST score 2–5; Zone 4 = DAST score 6–8; Zone 5 = DAST score 9–10