Identification of psychiatric inpatient recovery trajectories using routine outcome monitoring with emerging adults

•Treatment outcome trajectories are not understood for emerging adult inpatients.•LCGA analysis of symptom change trajectories found four patient groups.•Groups theoretically correspond to responders, treatment seekers and rejecters.•Groups differed on demographics, diagnoses, and service utilization patterns.•Results have implications for developing stepped-care models for inpatient care. Early intervention for emerging adults with addiction and mental health disorders is beneficial for long-term recovery. The present study investigated the utility of routine outcome monitoring during acute inpatient hospitalization for identifying emerging adults at risk of poor outcomes. This is a retrospective study using latent class growth analysis (LCGA) to identify patient groups with different recovery trajectories, with additional analyses to clarify the characteristics of these trajectory groups. The results identified four patient groups: Rapid responders (38%), gradual responders (34%), high distress non-responders (9%), and low distress non-responders (19%). The high distress non-responding group is characterized by behaviours and disorders associated with ambivalent care seeking: Voluntary admission, longer length of stay, lower service satisfaction, higher outpatient service utilization, elevated risk of emergency department presentation and hospital readmission, and depression/personality disorder diagnosis. The low distress group is characterized by behaviours and disorders associated with treatment rejection: Involuntary admission, shorter length of stay, reduced post-discharge service utilization, and psychotic disorder diagnosis. The results have implications for identifying at-risk youth and developing stepped-care models for more effective and efficient inpatient care.