Why Wait? Initiating Contingency Management in Traumatically Injured Patients During Hospitalization

This clinical trial is to implement contingency management (CM) as an intervention tool to address methamphetamine use and will be initiated during inpatient acute hospitalization in trauma injured patients.

The goals are:

* Gather effectiveness data on a CM program for participants in Hawaii who use methamphetamine during hospitalization and following discharge due to trauma injury * To assess participant perspectives on engaging with a CM program based at a Level 1 Trauma Center. Researches will assess both patient-reported and biologically-confirmed medium-term program effectiveness and conduct qualitative interviews with participants post-program. * To assess the rate of leaving against medical advice (AMA) and treatment completion in acute hospital setting in participants. * To assess the optimal timing of CM initiation for traumatically injured hospitalized patients by comparing patient outcomes (i.e. duration of CM participation and rates of CM program completion and providing negative urine samples) to NCT06532370 where CM was initiated after discharge from the hospital.

For total of 12 weeks, participants will:

* Be visited on Mondays/Thursdays or Tuesdays/Fridays by the research team to complete urine analysis during the hospitalization * Visit a follow up clinic up to 2 times per week on Mondays/Thursdays or Tuesdays/Fridays to complete urinalysis following discharge from the hospital * Complete Treatment Effectiveness Assessments at 6 and 12 weeks * Engage in qualitative interview at the end of the CM program